21254016355292 has 48 divisors (see below), whose sum is σ = 43545695128320. Its totient is φ = 8886516912000.

The previous prime is 21254016355291. The next prime is 21254016355367. The reversal of 21254016355292 is 29255361045212.

It is a super-2 number, since 2×21254016355292² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21254016355291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67090667 + ... + 67406717.

It is an arithmetic number, because the mean of its divisors is an integer number (907201981840).

Almost surely, 2^{21254016355292} is an apocalyptic number.

It is an amenable number.

21254016355292 is an abundant number, since it is smaller than the sum of its proper divisors (22291678773028).

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

21254016355292 is a wasteful number, since it uses less digits than its factorization.

21254016355292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374682 (or 374680 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 21254016355292 in words is "twenty-one trillion, two hundred fifty-four billion, sixteen million, three hundred fifty-five thousand, two hundred ninety-two".