11372820820 has 24 divisors (see below), whose sum is σ = 25287802344. Its totient is φ = 4281532416.

The previous prime is 11372820799. The next prime is 11372820821. The reversal of 11372820820 is 2802827311.

It can be written as a sum of positive squares in 4 ways, for example, as 232440516 + 11140380304 = 15246^2 + 105548^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11372820821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16724397 + ... + 16725076.

It is an arithmetic number, because the mean of its divisors is an integer number (1053658431).

Almost surely, 2^11372820820 is an apocalyptic number.

11372820820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11372820820 is an abundant number, since it is smaller than the sum of its proper divisors (13914981524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11372820820 is a wasteful number, since it uses less digits than its factorization.

11372820820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33449499 (or 33449497 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The spelling of 11372820820 in words is "eleven billion, three hundred seventy-two million, eight hundred twenty thousand, eight hundred twenty".