23521012547 has 2 divisors, whose sum is σ = 23521012548. Its totient is φ = 23521012546.

The previous prime is 23521012477. The next prime is 23521012601. The reversal of 23521012547 is 74521012532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23521012547 - 2¹² = 23521008451 is a prime.

It is a super-2 number, since 2×23521012547² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23521062547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760506273 + 11760506274.

It is an arithmetic number, because the mean of its divisors is an integer number (11760506274).

Almost surely, 2^23521012547 is an apocalyptic number.

23521012547 is a deficient number, since it is larger than the sum of its proper divisors (1).

23521012547 is an equidigital number, since it uses as much as digits as its factorization.

23521012547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 23521012547 in words is "twenty-three billion, five hundred twenty-one million, twelve thousand, five hundred forty-seven".