21162650642498 has 32 divisors (see below), whose sum is σ = 34194386276352. Its totient is φ = 9794283483600.

The previous prime is 21162650642447. The next prime is 21162650642527. The reversal of 21162650642498 is 89424605626112.

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, 28846493 + ... + 29571023.

It is an arithmetic number, because the mean of its divisors is an integer number (1068574571136).

Almost surely, 2^{21162650642498} is an apocalyptic number.

21162650642498 is a deficient number, since it is larger than the sum of its proper divisors (13031735633854).

21162650642498 is a wasteful number, since it uses less digits than its factorization.

21162650642498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745070.

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 21162650642498 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred fifty million, six hundred forty-two thousand, four hundred ninety-eight".