20398700 has 108 divisors (see below), whose sum is σ = 54027792. Its totient is φ = 6652800.

The previous prime is 20398699. The next prime is 20398709. The reversal of 20398700 is 789302.

It is a super-2 number, since 2×20398700² = 832213923380000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20398709) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 112610 + ... + 112790.

Almost surely, 2^20398700 is an apocalyptic number.

20398700 is a gapful number since it is divisible by the number (20) 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 20398700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27013896).

20398700 is an abundant number, since it is smaller than the sum of its proper divisors (33629092).

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

20398700 is a wasteful number, since it uses less digits than its factorization.

20398700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 218 counting only the distinct ones).

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

The square root of 20398700 is about 4516.4920015428. The cubic root of 20398700 is about 273.2336373804.

The spelling of 20398700 in words is "twenty million, three hundred ninety-eight thousand, seven hundred".