20963707 has 4 divisors (see below), whose sum is σ = 22067080. Its totient is φ = 19860336.

The previous prime is 20963699. The next prime is 20963717. The reversal of 20963707 is 70736902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70736902 = 2 ⋅35368451.

It is a cyclic number.

It is not a de Polignac number, because 20963707 - 2³ = 20963699 is a prime.

It is a super-2 number, since 2×20963707² = 878954022363698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20963717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551658 + ... + 551695.

It is an arithmetic number, because the mean of its divisors is an integer number (5516770).

Almost surely, 2^20963707 is an apocalyptic number.

20963707 is a deficient number, since it is larger than the sum of its proper divisors (1103373).

20963707 is a wasteful number, since it uses less digits than its factorization.

20963707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103372.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 20963707 is about 4578.6140916220. The cubic root of 20963707 is about 275.7333900616.

The spelling of 20963707 in words is "twenty million, nine hundred sixty-three thousand, seven hundred seven".