20015455346357 has 2 divisors, whose sum is σ = 20015455346358. Its totient is φ = 20015455346356.

The previous prime is 20015455346353. The next prime is 20015455346371. The reversal of 20015455346357 is 75364355451002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10301474387281 + 9713980959076 = 3209591^2 + 3116726^2 .

It is a cyclic number.

It is not a de Polignac number, because 20015455346357 - 2² = 20015455346353 is a prime.

It is a super-2 number, since 2×20015455346357² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20015455346353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007727673178 + 10007727673179.

It is an arithmetic number, because the mean of its divisors is an integer number (10007727673179).

Almost surely, 2^{20015455346357} is an apocalyptic number.

It is an amenable number.

20015455346357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015455346357 is an equidigital number, since it uses as much as digits as its factorization.

20015455346357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560000, while the sum is 50.

The spelling of 20015455346357 in words is "twenty trillion, fifteen billion, four hundred fifty-five million, three hundred forty-six thousand, three hundred fifty-seven".