20715931893642 has 16 divisors (see below), whose sum is σ = 41999423566080. Its totient is φ = 6810717334752.

The previous prime is 20715931893607. The next prime is 20715931893649. The reversal of 20715931893642 is 24639813951702.

It is not an unprimeable number, because it can be changed into a prime (20715931893649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23648323642 + ... + 23648324517.

It is an arithmetic number, because the mean of its divisors is an integer number (2624963972880).

It is a 1-persistent number, because it is pandigital, but 2⋅20715931893642 = 41431863787284 is not.

Almost surely, 2^{20715931893642} is an apocalyptic number.

20715931893642 is an abundant number, since it is smaller than the sum of its proper divisors (21283491672438).

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

20715931893642 is a wasteful number, since it uses less digits than its factorization.

20715931893642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47296648237.

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 20715931893642 in words is "twenty trillion, seven hundred fifteen billion, nine hundred thirty-one million, eight hundred ninety-three thousand, six hundred forty-two".