20610001500 has 96 divisors (see below), whose sum is σ = 65472406272. Its totient is φ = 4996360000.

The previous prime is 20610001487. The next prime is 20610001513. The reversal of 20610001500 is 510001602.

It is an interprime number because it is at equal distance from previous prime (20610001487) and next prime (20610001513).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20610001500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608046 + ... + 641045.

It is an arithmetic number, because the mean of its divisors is an integer number (682004232).

Almost surely, 2^20610001500 is an apocalyptic number.

20610001500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20610001500 is an abundant number, since it is smaller than the sum of its proper divisors (44862404772).

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

20610001500 is a wasteful number, since it uses less digits than its factorization.

20610001500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249124 (or 1249112 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The spelling of 20610001500 in words is "twenty billion, six hundred ten million, one thousand, five hundred".