21552034146 has 32 divisors (see below), whose sum is σ = 44551600128. Its totient is φ = 6946439760.

The previous prime is 21552034123. The next prime is 21552034151. The reversal of 21552034146 is 64143025512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436990 + ... + 483801.

It is an arithmetic number, because the mean of its divisors is an integer number (1392237504).

Almost surely, 2^21552034146 is an apocalyptic number.

21552034146 is an abundant number, since it is smaller than the sum of its proper divisors (22999565982).

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

21552034146 is a wasteful number, since it uses less digits than its factorization.

21552034146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920926.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 21552034146 its reverse (64143025512), we get a palindrome (85695059658).

The spelling of 21552034146 in words is "twenty-one billion, five hundred fifty-two million, thirty-four thousand, one hundred forty-six".