21473929703212 has 48 divisors (see below), whose sum is σ = 43071566906368. Its totient is φ = 9176611772160.

The previous prime is 21473929703201. The next prime is 21473929703221. The reversal of 21473929703212 is 21230792937412.

It is a super-2 number, since 2×21473929703212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21473929703212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67426387 + ... + 67744117.

Almost surely, 2^{21473929703212} is an apocalyptic number.

It is an amenable number.

21473929703212 is an abundant number, since it is smaller than the sum of its proper divisors (21597637203156).

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

21473929703212 is a wasteful number, since it uses less digits than its factorization.

21473929703212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324686 (or 324684 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 21473929703212 in words is "twenty-one trillion, four hundred seventy-three billion, nine hundred twenty-nine million, seven hundred three thousand, two hundred twelve".