20465642 has 32 divisors (see below), whose sum is σ = 33191424. Its totient is φ = 9446400.

The previous prime is 20465609. The next prime is 20465647. The reversal of 20465642 is 24656402.

It is not an unprimeable number, because it can be changed into a prime (20465647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210938 + ... + 211034.

It is an arithmetic number, because the mean of its divisors is an integer number (1037232).

Almost surely, 2^20465642 is an apocalyptic number.

20465642 is a deficient number, since it is larger than the sum of its proper divisors (12725782).

20465642 is a wasteful number, since it uses less digits than its factorization.

20465642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 20465642 is about 4523.8967715897. The cubic root of 20465642 is about 273.5321994515.

The spelling of 20465642 in words is "twenty million, four hundred sixty-five thousand, six hundred forty-two".