21635653264154 has 16 divisors (see below), whose sum is σ = 32814625305600. Its totient is φ = 10697705115600.

The previous prime is 21635653264109. The next prime is 21635653264163. The reversal of 21635653264154 is 45146235653612.

It is a junction number, because it is equal to n+sod(n) for n = 21635653264096 and 21635653264105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64904954 + ... + 65237445.

It is an arithmetic number, because the mean of its divisors is an integer number (2050914081600).

Almost surely, 2^{21635653264154} is an apocalyptic number.

21635653264154 is a deficient number, since it is larger than the sum of its proper divisors (11178972041446).

21635653264154 is a wasteful number, since it uses less digits than its factorization.

21635653264154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130143325.

The product of its digits is 15552000, while the sum is 53.

The spelling of 21635653264154 in words is "twenty-one trillion, six hundred thirty-five billion, six hundred fifty-three million, two hundred sixty-four thousand, one hundred fifty-four".