21626246154 has 16 divisors (see below), whose sum is σ = 44743957920. Its totient is φ = 6960171120.

The previous prime is 21626246141. The next prime is 21626246167. The reversal of 21626246154 is 45164262612.

It is an interprime number because it is at equal distance from previous prime (21626246141) and next prime (21626246167).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62144212 + ... + 62144559.

It is an arithmetic number, because the mean of its divisors is an integer number (2796497370).

Almost surely, 2^21626246154 is an apocalyptic number.

21626246154 is an abundant number, since it is smaller than the sum of its proper divisors (23117711766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21626246154 is a wasteful number, since it uses less digits than its factorization.

21626246154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124288805.

The product of its digits is 138240, while the sum is 39.

The spelling of 21626246154 in words is "twenty-one billion, six hundred twenty-six million, two hundred forty-six thousand, one hundred fifty-four".