21507962982 has 32 divisors (see below), whose sum is σ = 47127899520. Its totient is φ = 6489587520.

The previous prime is 21507962963. The next prime is 21507963011. The reversal of 21507962982 is 28926970512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683932 + ... + 714687.

It is an arithmetic number, because the mean of its divisors is an integer number (1472746860).

Almost surely, 2^21507962982 is an apocalyptic number.

21507962982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21507962982 is an abundant number, since it is smaller than the sum of its proper divisors (25619936538).

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

21507962982 is a wasteful number, since it uses less digits than its factorization.

21507962982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398868.

The product of its (nonzero) digits is 1088640, while the sum is 51.

It can be divided in two parts, 21507 and 962982, that added together give a palindrome (984489).

The spelling of 21507962982 in words is "twenty-one billion, five hundred seven million, nine hundred sixty-two thousand, nine hundred eighty-two".