20412090 has 48 divisors (see below), whose sum is σ = 53308008. Its totient is φ = 5419008.

The previous prime is 20412089. The next prime is 20412101. The reversal of 20412090 is 9021402.

It can be written as a sum of positive squares in 4 ways, for example, as 12510369 + 7901721 = 3537^2 + 2811^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29994 + ... + 30666.

Almost surely, 2^20412090 is an apocalyptic number.

20412090 is an abundant number, since it is smaller than the sum of its proper divisors (32895918).

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

20412090 is a wasteful number, since it uses less digits than its factorization.

20412090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20412090 is about 4517.9741035114. The cubic root of 20412090 is about 273.2934091334.

Adding to 20412090 its reverse (9021402), we get a palindrome (29433492).

The spelling of 20412090 in words is "twenty million, four hundred twelve thousand, ninety".