20253992 has 64 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 8751040.

The previous prime is 20253979. The next prime is 20254009. The reversal of 20253992 is 29935202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243983 + ... + 244065.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^20253992 is an apocalyptic number.

20253992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20253992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772800).

20253992 is an abundant number, since it is smaller than the sum of its proper divisors (23291608).

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

20253992 is a wasteful number, since it uses less digits than its factorization.

20253992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20253992 is about 4500.4435336975. The cubic root of 20253992 is about 272.5859987243.

The spelling of 20253992 in words is "twenty million, two hundred fifty-three thousand, nine hundred ninety-two".