20553189926 has 4 divisors (see below), whose sum is σ = 30829784892. Its totient is φ = 10276594962.

The previous prime is 20553189889. The next prime is 20553189953. The reversal of 20553189926 is 62998135502.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20553189926² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5138297480 + ... + 5138297483.

It is an arithmetic number, because the mean of its divisors is an integer number (7707446223).

Almost surely, 2^20553189926 is an apocalyptic number.

20553189926 is a deficient number, since it is larger than the sum of its proper divisors (10276594966).

20553189926 is a wasteful number, since it uses less digits than its factorization.

20553189926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276594965.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 20553189926 in words is "twenty billion, five hundred fifty-three million, one hundred eighty-nine thousand, nine hundred twenty-six".