20408892877 has 16 divisors (see below), whose sum is σ = 20760993792. Its totient is φ = 20060772480.

The previous prime is 20408892871. The next prime is 20408892899. The reversal of 20408892877 is 77829880402.

It is a cyclic number.

It is not a de Polignac number, because 20408892877 - 2³ = 20408892869 is a prime.

It is a super-2 number, since 2×20408892877² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408892871) 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, 6016852 + ... + 6020242.

It is an arithmetic number, because the mean of its divisors is an integer number (1297562112).

Almost surely, 2^20408892877 is an apocalyptic number.

It is an amenable number.

20408892877 is a deficient number, since it is larger than the sum of its proper divisors (352100915).

20408892877 is a wasteful number, since it uses less digits than its factorization.

20408892877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 20408892877 in words is "twenty billion, four hundred eight million, eight hundred ninety-two thousand, eight hundred seventy-seven".