21487437104 has 20 divisors (see below), whose sum is σ = 47579325264. Its totient is φ = 9208901568.

The previous prime is 21487437043. The next prime is 21487437107. The reversal of 21487437104 is 40173478412.

It is not an unprimeable number, because it can be changed into a prime (21487437107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95925947 + ... + 95926170.

Almost surely, 2^21487437104 is an apocalyptic number.

It is an amenable number.

21487437104 is an abundant number, since it is smaller than the sum of its proper divisors (26091888160).

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

21487437104 is a wasteful number, since it uses less digits than its factorization.

21487437104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191852132 (or 191852126 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 21487437104 in words is "twenty-one billion, four hundred eighty-seven million, four hundred thirty-seven thousand, one hundred four".