18952020 has 72 divisors (see below), whose sum is σ = 57876000. Its totient is φ = 5019840.

The previous prime is 18952007. The next prime is 18952027. The reversal of 18952020 is 2025981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18952027) 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 23 ways as a sum of consecutive naturals, for example, 37731 + ... + 38229.

Almost surely, 2^18952020 is an apocalyptic number.

18952020 is a gapful number since it is divisible by the number (10) 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 18952020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28938000).

18952020 is an abundant number, since it is smaller than the sum of its proper divisors (38923980).

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

18952020 is a wasteful number, since it uses less digits than its factorization.

18952020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18952020 is about 4353.3917811288. The cubic root of 18952020 is about 266.6153616576.

The spelling of 18952020 in words is "eighteen million, nine hundred fifty-two thousand, twenty".