20004533015 has 16 divisors (see below), whose sum is σ = 25141625856. Its totient is φ = 15251306400.

The previous prime is 20004533009. The next prime is 20004533033. The reversal of 20004533015 is 51033540002.

It is not a de Polignac number, because 20004533015 - 2¹⁰ = 20004531991 is a prime.

It is a super-2 number, since 2×20004533015² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289781 + ... + 352110.

It is an arithmetic number, because the mean of its divisors is an integer number (1571351616).

Almost surely, 2^20004533015 is an apocalyptic number.

20004533015 is a deficient number, since it is larger than the sum of its proper divisors (5137092841).

20004533015 is a wasteful number, since it uses less digits than its factorization.

20004533015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642190.

The product of its (nonzero) digits is 1800, while the sum is 23.

The spelling of 20004533015 in words is "twenty billion, four million, five hundred thirty-three thousand, fifteen".