21213364026654 has 24 divisors (see below), whose sum is σ = 45969482945880. Its totient is φ = 7070014538928.

The previous prime is 21213364026649. The next prime is 21213364026727. The reversal of 21213364026654 is 45662046331212.

21213364026654 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 336 + 4 + 0 + 266 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92115412 + ... + 92345415.

It is an arithmetic number, because the mean of its divisors is an integer number (1915395122745).

Almost surely, 2^{21213364026654} is an apocalyptic number.

21213364026654 is an abundant number, since it is smaller than the sum of its proper divisors (24756118919226).

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

21213364026654 is a wasteful number, since it uses less digits than its factorization.

21213364026654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184467224 (or 184467221 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 21213364026654 in words is "twenty-one trillion, two hundred thirteen billion, three hundred sixty-four million, twenty-six thousand, six hundred fifty-four".