20457775267115 has 4 divisors (see below), whose sum is σ = 24549330320544. Its totient is φ = 16366220213688.

The previous prime is 20457775267063. The next prime is 20457775267129. The reversal of 20457775267115 is 51176257775402.

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

It is a cyclic number.

It is not a de Polignac number, because 20457775267115 - 2²² = 20457771072811 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045777526707 + ... + 2045777526716.

It is an arithmetic number, because the mean of its divisors is an integer number (6137332580136).

Almost surely, 2^{20457775267115} is an apocalyptic number.

20457775267115 is a deficient number, since it is larger than the sum of its proper divisors (4091555053429).

20457775267115 is an equidigital number, since it uses as much as digits as its factorization.

20457775267115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091555053428.

The product of its (nonzero) digits is 28812000, while the sum is 59.

The spelling of 20457775267115 in words is "twenty trillion, four hundred fifty-seven billion, seven hundred seventy-five million, two hundred sixty-seven thousand, one hundred fifteen".