21245604762 has 32 divisors (see below), whose sum is σ = 43542334080. Its totient is φ = 6906798080.

The previous prime is 21245604739. The next prime is 21245604773. The reversal of 21245604762 is 26740654212.

It is a self number, because there is not a number n which added to its sum of digits gives 21245604762.

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, 805963 + ... + 831905.

It is an arithmetic number, because the mean of its divisors is an integer number (1360697940).

Almost surely, 2^21245604762 is an apocalyptic number.

21245604762 is an abundant number, since it is smaller than the sum of its proper divisors (22296729318).

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

21245604762 is a wasteful number, since it uses less digits than its factorization.

21245604762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29318.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 21245604762 in words is "twenty-one billion, two hundred forty-five million, six hundred four thousand, seven hundred sixty-two".