20364156 has 48 divisors (see below), whose sum is σ = 53176480. Its totient is φ = 6739200.

The previous prime is 20364151. The next prime is 20364161. The reversal of 20364156 is 65146302.

It is an interprime number because it is at equal distance from previous prime (20364151) and next prime (20364161).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20364151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16356 + ... + 17556.

Almost surely, 2^20364156 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 20364156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26588240).

20364156 is an abundant number, since it is smaller than the sum of its proper divisors (32812324).

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

20364156 is a wasteful number, since it uses less digits than its factorization.

20364156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20364156 is about 4512.6661742256. Note that the first 3 decimals coincide. The cubic root of 20364156 is about 273.0793151983.

The spelling of 20364156 in words is "twenty million, three hundred sixty-four thousand, one hundred fifty-six".