20156313100 has 108 divisors (see below), whose sum is σ = 54945340912. Its totient is φ = 6282460800.

The previous prime is 20156313083. The next prime is 20156313131. The reversal of 20156313100 is 131365102.

It is a happy number.

It is a super-2 number, since 2×20156313100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34287 + ... + 203686.

Almost surely, 2^20156313100 is an apocalyptic number.

20156313100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20156313100 is an abundant number, since it is smaller than the sum of its proper divisors (34789027812).

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

20156313100 is a wasteful number, since it uses less digits than its factorization.

20156313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238016 (or 237998 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 20156313100 its reverse (131365102), we get a palindrome (20287678202).

The spelling of 20156313100 in words is "twenty billion, one hundred fifty-six million, three hundred thirteen thousand, one hundred".