20089810 has 32 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 7094208.

The previous prime is 20089807. The next prime is 20089813. The reversal of 20089810 is 1898002.

20089810 = 219² + 220² + ... + 413².

It is an interprime number because it is at equal distance from previous prime (20089807) and next prime (20089813).

It is a super-2 number, since 2×20089810² = 807200931672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20089813) 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, 370 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (1270080).

Almost surely, 2^20089810 is an apocalyptic number.

20089810 is an abundant number, since it is smaller than the sum of its proper divisors (20552750).

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

20089810 is a wasteful number, since it uses less digits than its factorization.

20089810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 20089810 is about 4482.1657711423. The cubic root of 20089810 is about 271.8474580811.

The spelling of 20089810 in words is "twenty million, eighty-nine thousand, eight hundred ten".