20013172272640 has 40 divisors (see below), whose sum is σ = 47984707587960. Its totient is φ = 8005268908032.

The previous prime is 20013172272637. The next prime is 20013172272679. The reversal of 20013172272640 is 4627227131002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 20013172272640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3908820150 + ... + 3908825269.

It is an arithmetic number, because the mean of its divisors is an integer number (1199617689699).

Almost surely, 2^{20013172272640} is an apocalyptic number.

20013172272640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013172272640 is an abundant number, since it is smaller than the sum of its proper divisors (27971535315320).

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

20013172272640 is an frugal number, since it uses more digits than its factorization.

20013172272640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7817645442 (or 7817645426 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 20013172272640 in words is "twenty trillion, thirteen billion, one hundred seventy-two million, two hundred seventy-two thousand, six hundred forty".