21024470012 has 36 divisors (see below), whose sum is σ = 45532294416. Its totient is φ = 8317370880.

The previous prime is 21024469951. The next prime is 21024470017. The reversal of 21024470012 is 21007442012.

It is a self number, because there is not a number n which added to its sum of digits gives 21024470012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024470017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2216789 + ... + 2226252.

It is an arithmetic number, because the mean of its divisors is an integer number (1264785956).

Almost surely, 2^21024470012 is an apocalyptic number.

It is an amenable number.

21024470012 is an abundant number, since it is smaller than the sum of its proper divisors (24507824404).

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

21024470012 is a wasteful number, since it uses less digits than its factorization.

21024470012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443078 (or 4443063 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The spelling of 21024470012 in words is "twenty-one billion, twenty-four million, four hundred seventy thousand, twelve".