20405877836 has 12 divisors (see below), whose sum is σ = 35812610400. Its totient is φ = 10173703440.

The previous prime is 20405877827. The next prime is 20405877853. The reversal of 20405877836 is 63877850402.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7307300 + ... + 7310091.

It is an arithmetic number, because the mean of its divisors is an integer number (2984384200).

Almost surely, 2^20405877836 is an apocalyptic number.

It is an amenable number.

20405877836 is a deficient number, since it is larger than the sum of its proper divisors (15406732564).

20405877836 is a wasteful number, since it uses less digits than its factorization.

20405877836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14617744 (or 14617742 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 20405877836 in words is "twenty billion, four hundred five million, eight hundred seventy-seven thousand, eight hundred thirty-six".