20776125491 has 8 divisors (see below), whose sum is σ = 23857752000. Its totient is φ = 17893313640.

The previous prime is 20776125449. The next prime is 20776125499. The reversal of 20776125491 is 19452167702.

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 20776125491 - 2⁶ = 20776125427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20776125499) 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, 49703441 + ... + 49703858.

It is an arithmetic number, because the mean of its divisors is an integer number (2982219000).

Almost surely, 2^20776125491 is an apocalyptic number.

20776125491 is a deficient number, since it is larger than the sum of its proper divisors (3081626509).

20776125491 is a wasteful number, since it uses less digits than its factorization.

20776125491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99407329.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 20776125491 in words is "twenty billion, seven hundred seventy-six million, one hundred twenty-five thousand, four hundred ninety-one".