20742195746 has 8 divisors (see below), whose sum is σ = 31249160220. Its totient is φ = 10325809008.

The previous prime is 20742195713. The next prime is 20742195751. The reversal of 20742195746 is 64759124702.

It can be written as a sum of positive squares in 2 ways, for example, as 19916265625 + 825930121 = 141125^2 + 28739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20742195746.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22643861 + ... + 22644776.

Almost surely, 2^20742195746 is an apocalyptic number.

20742195746 is a deficient number, since it is larger than the sum of its proper divisors (10506964474).

20742195746 is a wasteful number, since it uses less digits than its factorization.

20742195746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45288868.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 20742195746 in words is "twenty billion, seven hundred forty-two million, one hundred ninety-five thousand, seven hundred forty-six".