21225362652 has 72 divisors (see below), whose sum is σ = 59189479440. Its totient is φ = 6371585280.

The previous prime is 21225362651. The next prime is 21225362671. The reversal of 21225362652 is 25626352212.

21225362652 is a `hidden beast` number, since 2 + 1 + 2 + 25 + 3 + 626 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21225362651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 533902 + ... + 572277.

Almost surely, 2^21225362652 is an apocalyptic number.

It is an amenable number.

21225362652 is an abundant number, since it is smaller than the sum of its proper divisors (37964116788).

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

21225362652 is a wasteful number, since it uses less digits than its factorization.

21225362652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106243 (or 1106238 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 21225362652 in words is "twenty-one billion, two hundred twenty-five million, three hundred sixty-two thousand, six hundred fifty-two".