20231490 has 64 divisors (see below), whose sum is σ = 51321600. Its totient is φ = 5094144.

The previous prime is 20231461. The next prime is 20231503. The reversal of 20231490 is 9413202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75076 + ... + 75344.

It is an arithmetic number, because the mean of its divisors is an integer number (801900).

Almost surely, 2^20231490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20231490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25660800).

20231490 is an abundant number, since it is smaller than the sum of its proper divisors (31090110).

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

20231490 is a wasteful number, since it uses less digits than its factorization.

20231490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20231490 is about 4497.9428631320. The cubic root of 20231490 is about 272.4850144664.

Adding to 20231490 its reverse (9413202), we get a palindrome (29644692).

The spelling of 20231490 in words is "twenty million, two hundred thirty-one thousand, four hundred ninety".