21552235410 has 32 divisors (see below), whose sum is σ = 51731527680. Its totient is φ = 5746578048.

The previous prime is 21552235361. The next prime is 21552235429. The reversal of 21552235410 is 1453225512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244911 + ... + 321069.

It is an arithmetic number, because the mean of its divisors is an integer number (1616610240).

Almost surely, 2^21552235410 is an apocalyptic number.

21552235410 is an abundant number, since it is smaller than the sum of its proper divisors (30179292270).

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

21552235410 is a wasteful number, since it uses less digits than its factorization.

21552235410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85602.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21552235410 in words is "twenty-one billion, five hundred fifty-two million, two hundred thirty-five thousand, four hundred ten".