20726190 has 24 divisors (see below), whose sum is σ = 53888328. Its totient is φ = 5526960.

The previous prime is 20726183. The next prime is 20726191. The reversal of 20726190 is 9162702.

It is a super-2 number, since 2×20726190² = 859149903832200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115056 + ... + 115235.

It is an arithmetic number, because the mean of its divisors is an integer number (2245347).

Almost surely, 2^20726190 is an apocalyptic number.

20726190 is an abundant number, since it is smaller than the sum of its proper divisors (33162138).

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

20726190 is a wasteful number, since it uses less digits than its factorization.

20726190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230304 (or 230301 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20726190 is about 4552.6025523869. The cubic root of 20726190 is about 274.6880871246.

Adding to 20726190 its reverse (9162702), we get a palindrome (29888892).

The spelling of 20726190 in words is "twenty million, seven hundred twenty-six thousand, one hundred ninety".