21534604160550 has 48 divisors (see below), whose sum is σ = 57513958194000. Its totient is φ = 5300825639040.

The previous prime is 21534604160539. The next prime is 21534604160561. The reversal of 21534604160550 is 5506140643512.

It is an interprime number because it is at equal distance from previous prime (21534604160539) and next prime (21534604160561).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5521691425 + ... + 5521695324.

It is an arithmetic number, because the mean of its divisors is an integer number (1198207462375).

Almost surely, 2^{21534604160550} is an apocalyptic number.

21534604160550 is an abundant number, since it is smaller than the sum of its proper divisors (35979354033450).

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

21534604160550 is a wasteful number, since it uses less digits than its factorization.

21534604160550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043386777 (or 11043386772 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 21534604160550 in words is "twenty-one trillion, five hundred thirty-four billion, six hundred four million, one hundred sixty thousand, five hundred fifty".