20101874128 has 40 divisors (see below), whose sum is σ = 47129608512. Its totient is φ = 8108318208.

The previous prime is 20101874123. The next prime is 20101874153. The reversal of 20101874128 is 82147810102.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 20101874093 and 20101874102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101874123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5276950 + ... + 5280757.

Almost surely, 2^20101874128 is an apocalyptic number.

20101874128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20101874128 is an abundant number, since it is smaller than the sum of its proper divisors (27027734384).

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

20101874128 is a wasteful number, since it uses less digits than its factorization.

20101874128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557739 (or 10557733 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 34.

The spelling of 20101874128 in words is "twenty billion, one hundred one million, eight hundred seventy-four thousand, one hundred twenty-eight".