20401503100 has 36 divisors (see below), whose sum is σ = 48295924488. Its totient is φ = 7418728000.

The previous prime is 20401503053. The next prime is 20401503119. The reversal of 20401503100 is 130510402.

It is a super-2 number, since 2×20401503100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9272311 + ... + 9274510.

It is an arithmetic number, because the mean of its divisors is an integer number (1341553458).

Almost surely, 2^20401503100 is an apocalyptic number.

20401503100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20401503100 is an abundant number, since it is smaller than the sum of its proper divisors (27894421388).

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

20401503100 is a wasteful number, since it uses less digits than its factorization.

20401503100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18546846 (or 18546839 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The spelling of 20401503100 in words is "twenty billion, four hundred one million, five hundred three thousand, one hundred".