21386232582 has 64 divisors (see below), whose sum is σ = 51608358144. Its totient is φ = 5820474240.

The previous prime is 21386232557. The next prime is 21386232587. The reversal of 21386232582 is 28523268312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21386232587) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305088 + ... + 368579.

It is an arithmetic number, because the mean of its divisors is an integer number (806380596).

Almost surely, 2^21386232582 is an apocalyptic number.

21386232582 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21386232582 is an abundant number, since it is smaller than the sum of its proper divisors (30222125562).

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

21386232582 is a wasteful number, since it uses less digits than its factorization.

21386232582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673733.

The product of its digits is 276480, while the sum is 42.

The spelling of 21386232582 in words is "twenty-one billion, three hundred eighty-six million, two hundred thirty-two thousand, five hundred eighty-two".