20976330 has 16 divisors (see below), whose sum is σ = 50343264. Its totient is φ = 5593680.

The previous prime is 20976269. The next prime is 20976337. The reversal of 20976330 is 3367902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 699211 = 20976330 / (2 + 0 + 9 + 7 + 6 + 3 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (20976337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349576 + ... + 349635.

It is an arithmetic number, because the mean of its divisors is an integer number (3146454).

Almost surely, 2^20976330 is an apocalyptic number.

20976330 is an abundant number, since it is smaller than the sum of its proper divisors (29366934).

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

20976330 is a wasteful number, since it uses less digits than its factorization.

20976330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699221.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 20976330 is about 4579.9923580722. The cubic root of 20976330 is about 275.7887219458.

The spelling of 20976330 in words is "twenty million, nine hundred seventy-six thousand, three hundred thirty".