20411513523 has 12 divisors (see below), whose sum is σ = 30168955960. Its totient is φ = 13291217856.

The previous prime is 20411513503. The next prime is 20411513537. The reversal of 20411513523 is 32531511402.

20411513523 is a `hidden beast` number, since 20 + 4 + 115 + 1 + 3 + 523 = 666.

It is not a de Polignac number, because 20411513523 - 2⁶ = 20411513459 is a prime.

It is a super-2 number, since 2×20411513523² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20411513503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26371078 + ... + 26371851.

Almost surely, 2^20411513523 is an apocalyptic number.

20411513523 is a deficient number, since it is larger than the sum of its proper divisors (9757442437).

20411513523 is a wasteful number, since it uses less digits than its factorization.

20411513523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52742978 (or 52742975 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20411513523 in words is "twenty billion, four hundred eleven million, five hundred thirteen thousand, five hundred twenty-three".