21400138023292 has 24 divisors (see below), whose sum is σ = 42818621773536. Its totient is φ = 9167556497088.

The previous prime is 21400138023289. The next prime is 21400138023389. The reversal of 21400138023292 is 29232083100412.

It is a congruent number.

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, 163734643 + ... + 163865290.

It is an arithmetic number, because the mean of its divisors is an integer number (1784109240564).

Almost surely, 2^{21400138023292} is an apocalyptic number.

It is an amenable number.

21400138023292 is an abundant number, since it is smaller than the sum of its proper divisors (21418483750244).

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

21400138023292 is a wasteful number, since it uses less digits than its factorization.

21400138023292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327602277 (or 327602275 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 21400138023292 in words is "twenty-one trillion, four hundred billion, one hundred thirty-eight million, twenty-three thousand, two hundred ninety-two".