20426190 has 16 divisors (see below), whose sum is σ = 49022928. Its totient is φ = 5446976.

The previous prime is 20426173. The next prime is 20426191. The reversal of 20426190 is 9162402.

It is a super-2 number, since 2×20426190² = 834458475832200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20426190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426191) 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, 340407 + ... + 340466.

It is an arithmetic number, because the mean of its divisors is an integer number (3063933).

Almost surely, 2^20426190 is an apocalyptic number.

20426190 is an abundant number, since it is smaller than the sum of its proper divisors (28596738).

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

20426190 is a wasteful number, since it uses less digits than its factorization.

20426190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680883.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20426190 is about 4519.5342680413. The cubic root of 20426190 is about 273.3563220139.

Adding to 20426190 its reverse (9162402), we get a palindrome (29588592).

The spelling of 20426190 in words is "twenty million, four hundred twenty-six thousand, one hundred ninety".