20269172 has 24 divisors (see below), whose sum is σ = 44224320. Its totient is φ = 7896960.

The previous prime is 20269169. The next prime is 20269177. The reversal of 20269172 is 27196202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20269177) 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 7 ways as a sum of consecutive naturals, for example, 32597 + ... + 33212.

It is an arithmetic number, because the mean of its divisors is an integer number (1842680).

Almost surely, 2^20269172 is an apocalyptic number.

20269172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20269172 is an abundant number, since it is smaller than the sum of its proper divisors (23955148).

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

20269172 is a wasteful number, since it uses less digits than its factorization.

20269172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65831 (or 65829 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20269172 is about 4502.1297182556. The cubic root of 20269172 is about 272.6540811405.

The spelling of 20269172 in words is "twenty million, two hundred sixty-nine thousand, one hundred seventy-two".