21225752662 has 16 divisors (see below), whose sum is σ = 33789368592. Its totient is φ = 9965514240.

The previous prime is 21225752633. The next prime is 21225752711. The reversal of 21225752662 is 26625752212.

It is a happy number.

It is a congruent 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, 706164 + ... + 735607.

It is an arithmetic number, because the mean of its divisors is an integer number (2111835537).

Almost surely, 2^21225752662 is an apocalyptic number.

21225752662 is a deficient number, since it is larger than the sum of its proper divisors (12563615930).

21225752662 is a wasteful number, since it uses less digits than its factorization.

21225752662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442223.

The product of its digits is 201600, while the sum is 40.

The spelling of 21225752662 in words is "twenty-one billion, two hundred twenty-five million, seven hundred fifty-two thousand, six hundred sixty-two".