20370128 has 40 divisors (see below), whose sum is σ = 42690720. Its totient is φ = 9383040.

The previous prime is 20370127. The next prime is 20370137. The reversal of 20370128 is 82107302.

It is a super-2 number, since 2×20370128² = 829884229472768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20370121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10343 + ... + 12153.

It is an arithmetic number, because the mean of its divisors is an integer number (1067268).

Almost surely, 2^20370128 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 20370128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21345360).

20370128 is an abundant number, since it is smaller than the sum of its proper divisors (22320592).

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

20370128 is a wasteful number, since it uses less digits than its factorization.

20370128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20370128 is about 4513.3278188051. The cubic root of 20370128 is about 273.1060070366.

The spelling of 20370128 in words is "twenty million, three hundred seventy thousand, one hundred twenty-eight".