20031400020 has 96 divisors (see below), whose sum is σ = 57045276288. Its totient is φ = 5251018752.

The previous prime is 20031399989. The next prime is 20031400021. The reversal of 20031400020 is 2000413002.

It is a super-2 number, since 2×20031400020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20031399969 and 20031400005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031400021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1337212 + ... + 1352108.

It is an arithmetic number, because the mean of its divisors is an integer number (594221628).

Almost surely, 2^20031400020 is an apocalyptic number.

20031400020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031400020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28522638144).

20031400020 is an abundant number, since it is smaller than the sum of its proper divisors (37013876268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20031400020 is a wasteful number, since it uses less digits than its factorization.

20031400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15289 (or 15287 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20031400020 its reverse (2000413002), we get a palindrome (22031813022).

The spelling of 20031400020 in words is "twenty billion, thirty-one million, four hundred thousand, twenty".