20402332 has 24 divisors (see below), whose sum is σ = 36587376. Its totient is φ = 9952128.

The previous prime is 20402321. The next prime is 20402351. The reversal of 20402332 is 23320402.

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, 30918 + ... + 31570.

It is an arithmetic number, because the mean of its divisors is an integer number (1524474).

Almost surely, 2^20402332 is an apocalyptic number.

It is an amenable number.

20402332 is a deficient number, since it is larger than the sum of its proper divisors (16185044).

20402332 is a wasteful number, since it uses less digits than its factorization.

20402332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20402332 is about 4516.8940656163. The cubic root of 20402332 is about 273.2498528856.

Adding to 20402332 its reverse (23320402), we get a palindrome (43722734).

The spelling of 20402332 in words is "twenty million, four hundred two thousand, three hundred thirty-two".