20356815142 has 16 divisors (see below), whose sum is σ = 30675114000. Its totient is φ = 10131851520.

The previous prime is 20356815133. The next prime is 20356815173. The reversal of 20356815142 is 24151865302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549109 + ... + 585007.

It is an arithmetic number, because the mean of its divisors is an integer number (1917194625).

Almost surely, 2^20356815142 is an apocalyptic number.

20356815142 is a deficient number, since it is larger than the sum of its proper divisors (10318298858).

20356815142 is a wasteful number, since it uses less digits than its factorization.

20356815142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37191.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 20356815142 in words is "twenty billion, three hundred fifty-six million, eight hundred fifteen thousand, one hundred forty-two".