20976215914 has 4 divisors (see below), whose sum is σ = 31464323874. Its totient is φ = 10488107956.

The previous prime is 20976215903. The next prime is 20976215917. The reversal of 20976215914 is 41951267902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41951267902 = 2 ⋅20975633951.

It can be written as a sum of positive squares in only one way, i.e., 19927557225 + 1048658689 = 141165^2 + 32383^2 .

It is not an unprimeable number, because it can be changed into a prime (20976215917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5244053977 + ... + 5244053980.

Almost surely, 2^20976215914 is an apocalyptic number.

20976215914 is a deficient number, since it is larger than the sum of its proper divisors (10488107960).

20976215914 is a wasteful number, since it uses less digits than its factorization.

20976215914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10488107959.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 20976215914 in words is "twenty billion, nine hundred seventy-six million, two hundred fifteen thousand, nine hundred fourteen".