20164408 has 48 divisors (see below), whose sum is σ = 42756840. Its totient is φ = 8902080.

The previous prime is 20164393. The next prime is 20164409. The reversal of 20164408 is 80446102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35535 + ... + 36097.

Almost surely, 2^20164408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20164408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21378420).

20164408 is an abundant number, since it is smaller than the sum of its proper divisors (22592432).

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

20164408 is a wasteful number, since it uses less digits than its factorization.

20164408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20164408 is about 4490.4797071137. The cubic root of 20164408 is about 272.1835194611.

The spelling of 20164408 in words is "twenty million, one hundred sixty-four thousand, four hundred eight".