20000031400 has 48 divisors (see below), whose sum is σ = 46685449440. Its totient is φ = 7968120000.

The previous prime is 20000031379. The next prime is 20000031407. The reversal of 20000031400 is 413000002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20000031407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149004 + ... + 249403.

It is an arithmetic number, because the mean of its divisors is an integer number (972613530).

Almost surely, 2^20000031400 is an apocalyptic number.

20000031400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000031400 is an abundant number, since it is smaller than the sum of its proper divisors (26685418040).

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

20000031400 is a wasteful number, since it uses less digits than its factorization.

20000031400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398674 (or 398665 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 20000031400 its reverse (413000002), we get a palindrome (20413031402).

The spelling of 20000031400 in words is "twenty billion, thirty-one thousand, four hundred".