20787757477627 has 12 divisors (see below), whose sum is σ = 24473022577416. Its totient is φ = 17603402197920.

The previous prime is 20787757477601. The next prime is 20787757477649. The reversal of 20787757477627 is 72677475778702.

It is not a de Polignac number, because 20787757477627 - 2⁷ = 20787757477499 is a prime.

It is a super-2 number, since 2×20787757477627² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20787757477027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2555658274 + ... + 2555666407.

It is an arithmetic number, because the mean of its divisors is an integer number (2039418548118).

Almost surely, 2^{20787757477627} is an apocalyptic number.

20787757477627 is a deficient number, since it is larger than the sum of its proper divisors (3685265099789).

20787757477627 is an equidigital number, since it uses as much as digits as its factorization.

20787757477627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111324778 (or 5111324771 counting only the distinct ones).

The product of its (nonzero) digits is 3162405120, while the sum is 76.

The spelling of 20787757477627 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred fifty-seven million, four hundred seventy-seven thousand, six hundred twenty-seven".