11620276821 has 16 divisors (see below), whose sum is σ = 17963713920. Its totient is φ = 7410031200.

The previous prime is 11620276817. The next prime is 11620276873. The reversal of 11620276821 is 12867202611.

11620276821 is a `hidden beast` number, since 1 + 1 + 620 + 2 + 7 + 6 + 8 + 21 = 666.

It is not a de Polignac number, because 11620276821 - 2² = 11620276817 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11620276891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9355480 + ... + 9356721.

It is an arithmetic number, because the mean of its divisors is an integer number (1122732120).

Almost surely, 2^11620276821 is an apocalyptic number.

It is an amenable number.

11620276821 is a deficient number, since it is larger than the sum of its proper divisors (6343437099).

11620276821 is a wasteful number, since it uses less digits than its factorization.

11620276821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18712233 (or 18712227 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 11620276821 in words is "eleven billion, six hundred twenty million, two hundred seventy-six thousand, eight hundred twenty-one".