21622661215654 has 32 divisors (see below), whose sum is σ = 33095297061216. Its totient is φ = 10591516565760.

The previous prime is 21622661215607. The next prime is 21622661215657. The reversal of 21622661215654 is 45651216622612.

It is a junction number, because it is equal to n+sod(n) for n = 21622661215598 and 21622661215607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622661215657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194136009 + ... + 194247355.

It is an arithmetic number, because the mean of its divisors is an integer number (1034228033163).

Almost surely, 2^{21622661215654} is an apocalyptic number.

21622661215654 is a deficient number, since it is larger than the sum of its proper divisors (11472635845562).

21622661215654 is a wasteful number, since it uses less digits than its factorization.

21622661215654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114120.

The product of its digits is 2073600, while the sum is 49.

The spelling of 21622661215654 in words is "twenty-one trillion, six hundred twenty-two billion, six hundred sixty-one million, two hundred fifteen thousand, six hundred fifty-four".