20163572 has 24 divisors (see below), whose sum is σ = 41456352. Its totient is φ = 8460000.

The previous prime is 20163551. The next prime is 20163593. The reversal of 20163572 is 27536102.

It is an interprime number because it is at equal distance from previous prime (20163551) and next prime (20163593).

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17054 + ... + 18197.

It is an arithmetic number, because the mean of its divisors is an integer number (1727348).

Almost surely, 2^20163572 is an apocalyptic number.

20163572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20163572 is an abundant number, since it is smaller than the sum of its proper divisors (21292780).

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

20163572 is a wasteful number, since it uses less digits than its factorization.

20163572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35279 (or 35277 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20163572 is about 4490.3866203257. The cubic root of 20163572 is about 272.1797579065.

Adding to 20163572 its reverse (27536102), we get a palindrome (47699674).

The spelling of 20163572 in words is "twenty million, one hundred sixty-three thousand, five hundred seventy-two".