20100131420 has 24 divisors (see below), whose sum is σ = 43665804000. Its totient is φ = 7762809152.

The previous prime is 20100131393. The next prime is 20100131461. The reversal of 20100131420 is 2413100102.

It is a junction number, because it is equal to n+sod(n) for n = 20100131395 and 20100131404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17327120 + ... + 17328279.

It is an arithmetic number, because the mean of its divisors is an integer number (1819408500).

Almost surely, 2^20100131420 is an apocalyptic number.

20100131420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100131420 is an abundant number, since it is smaller than the sum of its proper divisors (23565672580).

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

20100131420 is a wasteful number, since it uses less digits than its factorization.

20100131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34655437 (or 34655435 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20100131420 its reverse (2413100102), we get a palindrome (22513231522).

The spelling of 20100131420 in words is "twenty billion, one hundred million, one hundred thirty-one thousand, four hundred twenty".