20342590 has 16 divisors (see below), whose sum is σ = 36822240. Its totient is φ = 8091360.

The previous prime is 20342573. The next prime is 20342611. The reversal of 20342590 is 9524302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3810 + ... + 7429.

It is an arithmetic number, because the mean of its divisors is an integer number (2301390).

Almost surely, 2^20342590 is an apocalyptic number.

20342590 is a deficient number, since it is larger than the sum of its proper divisors (16479650).

20342590 is a wasteful number, since it uses less digits than its factorization.

20342590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11427.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20342590 is about 4510.2760447671. The cubic root of 20342590 is about 272.9828825470.

Adding to 20342590 its reverse (9524302), we get a palindrome (29866892).

It can be divided in two parts, 2034 and 2590, that added together give a square (4624 = 68²).

The spelling of 20342590 in words is "twenty million, three hundred forty-two thousand, five hundred ninety".