20413355049 has 20 divisors (see below), whose sum is σ = 30544835860. Its totient is φ = 13586227200.

The previous prime is 20413355009. The next prime is 20413355057. The reversal of 20413355049 is 94055331402.

20413355049 is a `hidden beast` number, since 20 + 41 + 3 + 3 + 550 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10576682649 + 9836672400 = 102843^2 + 99180^2 .

It is not a de Polignac number, because 20413355049 - 2²³ = 20404966441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20413355009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 160984 + ... + 258345.

It is an arithmetic number, because the mean of its divisors is an integer number (1527241793).

Almost surely, 2^20413355049 is an apocalyptic number.

It is an amenable number.

20413355049 is a deficient number, since it is larger than the sum of its proper divisors (10131480811).

20413355049 is an equidigital number, since it uses as much as digits as its factorization.

20413355049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419942 (or 419933 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 20413355049 in words is "twenty billion, four hundred thirteen million, three hundred fifty-five thousand, forty-nine".