21190005704 has 48 divisors (see below), whose sum is σ = 46420019100. Its totient is φ = 9041735808.

The previous prime is 21190005677. The next prime is 21190005743. The reversal of 21190005704 is 40750009112.

It can be written as a sum of positive squares in 2 ways, for example, as 16795641604 + 4394364100 = 129598^2 + 66290^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28259 + ... + 207794.

Almost surely, 2^21190005704 is an apocalyptic number.

It is an amenable number.

21190005704 is an abundant number, since it is smaller than the sum of its proper divisors (25230013396).

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

21190005704 is a wasteful number, since it uses less digits than its factorization.

21190005704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236302 (or 236291 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The spelling of 21190005704 in words is "twenty-one billion, one hundred ninety million, five thousand, seven hundred four".