20382813642 has 32 divisors (see below), whose sum is σ = 42100819200. Its totient is φ = 6574988288.

The previous prime is 20382813611. The next prime is 20382813653. The reversal of 20382813642 is 24631828302.

It is a self number, because there is not a number n which added to its sum of digits gives 20382813642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380967 + ... + 431162.

It is an arithmetic number, because the mean of its divisors is an integer number (1315650600).

Almost surely, 2^20382813642 is an apocalyptic number.

20382813642 is an abundant number, since it is smaller than the sum of its proper divisors (21718005558).

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

20382813642 is a wasteful number, since it uses less digits than its factorization.

20382813642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812270.

The product of its (nonzero) digits is 110592, while the sum is 39.

It can be divided in two parts, 203828 and 13642, that added together give a triangular number (217470 = T₆₅₉).

The spelling of 20382813642 in words is "twenty billion, three hundred eighty-two million, eight hundred thirteen thousand, six hundred forty-two".