20164830 has 64 divisors (see below), whose sum is σ = 55807488. Its totient is φ = 4567680.

The previous prime is 20164783. The next prime is 20164847. The reversal of 20164830 is 3846102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20164830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27144 + ... + 27876.

It is an arithmetic number, because the mean of its divisors is an integer number (871992).

Almost surely, 2^20164830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20164830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27903744).

20164830 is an abundant number, since it is smaller than the sum of its proper divisors (35642658).

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

20164830 is a wasteful number, since it uses less digits than its factorization.

20164830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20164830 is about 4490.5266951662. The cubic root of 20164830 is about 272.1854181968.

The spelling of 20164830 in words is "twenty million, one hundred sixty-four thousand, eight hundred thirty".