20460147665557 has 16 divisors (see below), whose sum is σ = 21041904038400. Its totient is φ = 19886249306880.

The previous prime is 20460147665539. The next prime is 20460147665627. The reversal of 20460147665557 is 75556674106402.

It is a cyclic number.

It is not a de Polignac number, because 20460147665557 - 2²³ = 20460139276949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20460147665537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101858332 + ... + 102059002.

It is an arithmetic number, because the mean of its divisors is an integer number (1315119002400).

Almost surely, 2^{20460147665557} is an apocalyptic number.

It is an amenable number.

20460147665557 is a deficient number, since it is larger than the sum of its proper divisors (581756372843).

20460147665557 is a wasteful number, since it uses less digits than its factorization.

20460147665557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220236.

The product of its (nonzero) digits is 42336000, while the sum is 58.

The spelling of 20460147665557 in words is "twenty trillion, four hundred sixty billion, one hundred forty-seven million, six hundred sixty-five thousand, five hundred fifty-seven".