20177072 has 20 divisors (see below), whose sum is σ = 40793520. Its totient is φ = 9649728.

The previous prime is 20177071. The next prime is 20177081. The reversal of 20177072 is 27077102.

It is a super-2 number, since 2×20177072² = 814228468986368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20177071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27047 + ... + 27782.

It is an arithmetic number, because the mean of its divisors is an integer number (2039676).

Almost surely, 2^20177072 is an apocalyptic number.

It is an amenable number.

20177072 is an abundant number, since it is smaller than the sum of its proper divisors (20616448).

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

20177072 is a wasteful number, since it uses less digits than its factorization.

20177072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54860 (or 54854 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 20177072 is about 4491.8895801210. The cubic root of 20177072 is about 272.2404880026.

The spelling of 20177072 in words is "twenty million, one hundred seventy-seven thousand, seventy-two".