21024551135 has 16 divisors (see below), whose sum is σ = 29181067776. Its totient is φ = 14243136288.

The previous prime is 21024551123. The next prime is 21024551179. The reversal of 21024551135 is 53115542012.

It is a cyclic number.

It is not a de Polignac number, because 21024551135 - 2³⁰ = 19950809311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21024551098 and 21024551107.

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, 3615779 + ... + 3621588.

It is an arithmetic number, because the mean of its divisors is an integer number (1823816736).

Almost surely, 2^21024551135 is an apocalyptic number.

21024551135 is a deficient number, since it is larger than the sum of its proper divisors (8156516641).

21024551135 is an equidigital number, since it uses as much as digits as its factorization.

21024551135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7237462.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 21024551135 in words is "twenty-one billion, twenty-four million, five hundred fifty-one thousand, one hundred thirty-five".