20787757478627 has 16 divisors (see below), whose sum is σ = 21706223185920. Its totient is φ = 19870516778112.

The previous prime is 20787757478603. The next prime is 20787757478693. The reversal of 20787757478627 is 72687475778702.

It is a cyclic number.

It is not a de Polignac number, because 20787757478627 - 2¹² = 20787757474531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20787757478027) 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, 236996843 + ... + 237084539.

It is an arithmetic number, because the mean of its divisors is an integer number (1356638949120).

Almost surely, 2^{20787757478627} is an apocalyptic number.

20787757478627 is a deficient number, since it is larger than the sum of its proper divisors (918465707293).

20787757478627 is a wasteful number, since it uses less digits than its factorization.

20787757478627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94562.

The product of its (nonzero) digits is 3614177280, while the sum is 77.

The spelling of 20787757478627 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred fifty-seven million, four hundred seventy-eight thousand, six hundred twenty-seven".