20368642692 has 12 divisors (see below), whose sum is σ = 47526832976. Its totient is φ = 6789547560.

The previous prime is 20368642691. The next prime is 20368642699. The reversal of 20368642692 is 29624686302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20368642692² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20368642691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848693434 + ... + 848693457.

Almost surely, 2^20368642692 is an apocalyptic number.

It is an amenable number.

20368642692 is an abundant number, since it is smaller than the sum of its proper divisors (27158190284).

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

20368642692 is a wasteful number, since it uses less digits than its factorization.

20368642692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697386898 (or 1697386896 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 20368642692 in words is "twenty billion, three hundred sixty-eight million, six hundred forty-two thousand, six hundred ninety-two".