20976696 has 96 divisors (see below), whose sum is σ = 62222160. Its totient is φ = 6345216.

The previous prime is 20976661. The next prime is 20976701. The reversal of 20976696 is 69667902.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 68175 + ... + 68481.

Almost surely, 2^20976696 is an apocalyptic number.

20976696 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20976696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31111080).

20976696 is an abundant number, since it is smaller than the sum of its proper divisors (41245464).

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

20976696 is a wasteful number, since it uses less digits than its factorization.

20976696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 20976696 is about 4580.0323142965. The cubic root of 20976696 is about 275.7903259455.

The spelling of 20976696 in words is "twenty million, nine hundred seventy-six thousand, six hundred ninety-six".