21054552562 has 8 divisors (see below), whose sum is σ = 31861314396. Its totient is φ = 10434114432.

The previous prime is 21054552509. The next prime is 21054552587. The reversal of 21054552562 is 26525545012.

It can be written as a sum of positive squares in 2 ways, for example, as 15390635481 + 5663917081 = 124059^2 + 75259^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46580643 + ... + 46581094.

Almost surely, 2^21054552562 is an apocalyptic number.

21054552562 is a deficient number, since it is larger than the sum of its proper divisors (10806761834).

21054552562 is a wasteful number, since it uses less digits than its factorization.

21054552562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93161852.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 21054552562 in words is "twenty-one billion, fifty-four million, five hundred fifty-two thousand, five hundred sixty-two".