20169792 has 126 divisors (see below), whose sum is σ = 61645038. Its totient is φ = 6303744.

The previous prime is 20169767. The next prime is 20169817. The reversal of 20169792 is 29796102.

It is an interprime number because it is at equal distance from previous prime (20169767) and next prime (20169817).

It can be written as a sum of positive squares in only one way, i.e., 16842816 + 3326976 = 4104^2 + 1824^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 207888 + ... + 207984.

Almost surely, 2^20169792 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 20169792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30822519).

20169792 is an abundant number, since it is smaller than the sum of its proper divisors (41475246).

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

20169792 is a wasteful number, since it uses less digits than its factorization.

20169792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 20169792 is about 4491.0791576190. The cubic root of 20169792 is about 272.2077421024.

The spelling of 20169792 in words is "twenty million, one hundred sixty-nine thousand, seven hundred ninety-two".