20408813492 has 6 divisors (see below), whose sum is σ = 35715423618. Its totient is φ = 10204406744.

The previous prime is 20408813471. The next prime is 20408813507. The reversal of 20408813492 is 29431880402.

It can be written as a sum of positive squares in only one way, i.e., 16374785296 + 4034028196 = 127964^2 + 63514^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551101683 + ... + 2551101690.

It is an arithmetic number, because the mean of its divisors is an integer number (5952570603).

Almost surely, 2^20408813492 is an apocalyptic number.

It is an amenable number.

20408813492 is a deficient number, since it is larger than the sum of its proper divisors (15306610126).

20408813492 is a wasteful number, since it uses less digits than its factorization.

20408813492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102203377 (or 5102203375 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 20408813492 in words is "twenty billion, four hundred eight million, eight hundred thirteen thousand, four hundred ninety-two".