20393934802 has 4 divisors (see below), whose sum is σ = 30590902206. Its totient is φ = 10196967400.

The previous prime is 20393934797. The next prime is 20393934809. The reversal of 20393934802 is 20843939302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20843939302 = 2 ⋅10421969651.

It can be written as a sum of positive squares in only one way, i.e., 14103700081 + 6290234721 = 118759^2 + 79311^2 .

It is not an unprimeable number, because it can be changed into a prime (20393934809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5098483699 + ... + 5098483702.

Almost surely, 2^20393934802 is an apocalyptic number.

20393934802 is a deficient number, since it is larger than the sum of its proper divisors (10196967404).

20393934802 is a wasteful number, since it uses less digits than its factorization.

20393934802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10196967403.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 20393934802 in words is "twenty billion, three hundred ninety-three million, nine hundred thirty-four thousand, eight hundred two".