20455191388 has 12 divisors (see below), whose sum is σ = 36330862792. Its totient is φ = 10074944880.

The previous prime is 20455191343. The next prime is 20455191389. The reversal of 20455191388 is 88319155402.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455191389) 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, 38162403 + ... + 38162938.

Almost surely, 2^20455191388 is an apocalyptic number.

It is an amenable number.

20455191388 is a deficient number, since it is larger than the sum of its proper divisors (15875671404).

20455191388 is a wasteful number, since it uses less digits than its factorization.

20455191388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76325412 (or 76325410 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 20455191388 in words is "twenty billion, four hundred fifty-five million, one hundred ninety-one thousand, three hundred eighty-eight".