20950697 has 4 divisors (see below), whose sum is σ = 21067920. Its totient is φ = 20833476.

The previous prime is 20950691. The next prime is 20950703. The reversal of 20950697 is 79605902.

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 an interprime number because it is at equal distance from previous prime (20950691) and next prime (20950703).

It is a cyclic number.

It is not a de Polignac number, because 20950697 - 2¹⁰ = 20949673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20950697.

It is not an unprimeable number, because it can be changed into a prime (20950691) 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, 58343 + ... + 58700.

It is an arithmetic number, because the mean of its divisors is an integer number (5266980).

Almost surely, 2^20950697 is an apocalyptic number.

It is an amenable number.

20950697 is a deficient number, since it is larger than the sum of its proper divisors (117223).

20950697 is a wasteful number, since it uses less digits than its factorization.

20950697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117222.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 20950697 is about 4577.1931355362. The cubic root of 20950697 is about 275.6763385464.

The spelling of 20950697 in words is "twenty million, nine hundred fifty thousand, six hundred ninety-seven".