20169312 has 24 divisors (see below), whose sum is σ = 52944696. Its totient is φ = 6723072.

The previous prime is 20169311. The next prime is 20169323. The reversal of 20169312 is 21396102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20169312² = 813602293106688, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20169311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104953 + ... + 105144.

It is an arithmetic number, because the mean of its divisors is an integer number (2206029).

Almost surely, 2^20169312 is an apocalyptic number.

It is an amenable number.

20169312 is an abundant number, since it is smaller than the sum of its proper divisors (32775384).

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

20169312 is a wasteful number, since it uses less digits than its factorization.

20169312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210110 (or 210102 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 20169312 is about 4491.0257180292. The cubic root of 20169312 is about 272.2055827551.

The spelling of 20169312 in words is "twenty million, one hundred sixty-nine thousand, three hundred twelve".