19402532686 has 4 divisors (see below), whose sum is σ = 29103799032. Its totient is φ = 9701266342.

The previous prime is 19402532663. The next prime is 19402532707. The reversal of 19402532686 is 68623520491.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 4850633170 + ... + 4850633173.

It is an arithmetic number, because the mean of its divisors is an integer number (7275949758).

Almost surely, 2^19402532686 is an apocalyptic number.

19402532686 is a deficient number, since it is larger than the sum of its proper divisors (9701266346).

19402532686 is an equidigital number, since it uses as much as digits as its factorization.

19402532686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9701266345.

The product of its (nonzero) digits is 622080, while the sum is 46.

It can be divided in two parts, 1940 and 2532686, that added together give a triangular number (2534626 = T₂₂₅₁).

The spelling of 19402532686 in words is "nineteen billion, four hundred two million, five hundred thirty-two thousand, six hundred eighty-six".