20810190 has 32 divisors (see below), whose sum is σ = 51010560. Its totient is φ = 5430944.

The previous prime is 20810189. The next prime is 20810191. The reversal of 20810190 is 9101802.

It is an interprime number because it is at equal distance from previous prime (20810189) and next prime (20810191).

It is a super-2 number, since 2×20810190² = 866128015672200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20810191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5970 + ... + 8789.

It is an arithmetic number, because the mean of its divisors is an integer number (1594080).

Almost surely, 2^20810190 is an apocalyptic number.

20810190 is an abundant number, since it is smaller than the sum of its proper divisors (30200370).

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

20810190 is a wasteful number, since it uses less digits than its factorization.

20810190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14816.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 20810190 is about 4561.8187162578. The cubic root of 20810190 is about 275.0586761847.

Adding to 20810190 its reverse (9101802), we get a palindrome (29911992).

The spelling of 20810190 in words is "twenty million, eight hundred ten thousand, one hundred ninety".