20996077 has 4 divisors (see below), whose sum is σ = 21009376. Its totient is φ = 20982780.

The previous prime is 20996069. The next prime is 20996099. The reversal of 20996077 is 77069902.

20996077 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20996077 - 2³ = 20996069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20996047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3903 + ... + 7564.

It is an arithmetic number, because the mean of its divisors is an integer number (5252344).

Almost surely, 2^20996077 is an apocalyptic number.

It is an amenable number.

20996077 is a deficient number, since it is larger than the sum of its proper divisors (13299).

20996077 is a wasteful number, since it uses less digits than its factorization.

20996077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13298.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 20996077 is about 4582.1476405720. The cubic root of 20996077 is about 275.8752367912.

The spelling of 20996077 in words is "twenty million, nine hundred ninety-six thousand, seventy-seven".