20976402 has 16 divisors (see below), whose sum is σ = 44420832. Its totient is φ = 6580800.

The previous prime is 20976377. The next prime is 20976407. The reversal of 20976402 is 20467902.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20976402.

It is not an unprimeable number, because it can be changed into a prime (20976407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102724 + ... + 102927.

It is an arithmetic number, because the mean of its divisors is an integer number (2776302).

Almost surely, 2^20976402 is an apocalyptic number.

20976402 is an abundant number, since it is smaller than the sum of its proper divisors (23444430).

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

20976402 is a wasteful number, since it uses less digits than its factorization.

20976402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205673.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20976402 is about 4580.0002183406. Note that the first 3 decimals coincide. The cubic root of 20976402 is about 275.7890374882.

The spelling of 20976402 in words is "twenty million, nine hundred seventy-six thousand, four hundred two".