20873575351577 has 8 divisors (see below), whose sum is σ = 22479302946240. Its totient is φ = 19267857464400.

The previous prime is 20873575351567. The next prime is 20873575351579. The reversal of 20873575351577 is 77515357537802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20873575351577 - 2⁴ = 20873575351561 is a prime.

It is a super-2 number, since 2×20873575351577² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20873575351579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2393702 + ... + 6890352.

It is an arithmetic number, because the mean of its divisors is an integer number (2809912868280).

Almost surely, 2^{20873575351577} is an apocalyptic number.

It is an amenable number.

20873575351577 is a deficient number, since it is larger than the sum of its proper divisors (1605727594663).

20873575351577 is a wasteful number, since it uses less digits than its factorization.

20873575351577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853743.

The product of its (nonzero) digits is 216090000, while the sum is 65.

The spelling of 20873575351577 in words is "twenty trillion, eight hundred seventy-three billion, five hundred seventy-five million, three hundred fifty-one thousand, five hundred seventy-seven".