21487474002 has 16 divisors (see below), whose sum is σ = 43036261632. Its totient is φ = 7152272400.

The previous prime is 21487473947. The next prime is 21487474027. The reversal of 21487474002 is 20047478412.

It is a happy 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, 2550178 + ... + 2558589.

It is an arithmetic number, because the mean of its divisors is an integer number (2689766352).

Almost surely, 2^21487474002 is an apocalyptic number.

21487474002 is an abundant number, since it is smaller than the sum of its proper divisors (21548787630).

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

21487474002 is a wasteful number, since it uses less digits than its factorization.

21487474002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109473.

The product of its (nonzero) digits is 100352, while the sum is 39.

The spelling of 21487474002 in words is "twenty-one billion, four hundred eighty-seven million, four hundred seventy-four thousand, two".