20166685352 has 32 divisors (see below), whose sum is σ = 41658472800. Its totient is φ = 9075912000.

The previous prime is 20166685351. The next prime is 20166685391. The reversal of 20166685352 is 25358666102.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (20166685351) 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, 1125602 + ... + 1143377.

It is an arithmetic number, because the mean of its divisors is an integer number (1301827275).

Almost surely, 2^20166685352 is an apocalyptic number.

20166685352 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20166685352 is an abundant number, since it is smaller than the sum of its proper divisors (21491787448).

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

20166685352 is a wasteful number, since it uses less digits than its factorization.

20166685352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269097 (or 2269093 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 20166685352 in words is "twenty billion, one hundred sixty-six million, six hundred eighty-five thousand, three hundred fifty-two".