20976956 has 96 divisors (see below), whose sum is σ = 51179520. Its totient is φ = 7300800.

The previous prime is 20976937. The next prime is 20976973. The reversal of 20976956 is 65967902.

20976956 = T₂₃₁ + T₂₃₂ + ... + T₅₁₆.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676661 + ... + 676691.

It is an arithmetic number, because the mean of its divisors is an integer number (533120).

Almost surely, 2^20976956 is an apocalyptic number.

20976956 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 20976956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25589760).

20976956 is an abundant number, since it is smaller than the sum of its proper divisors (30202564).

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

20976956 is a wasteful number, since it uses less digits than its factorization.

20976956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 20976956 is about 4580.0606982877. The cubic root of 20976956 is about 275.7914653876.

The spelling of 20976956 in words is "twenty million, nine hundred seventy-six thousand, nine hundred fifty-six".