20953719 has 12 divisors (see below), whose sum is σ = 30310176. Its totient is φ = 13948992.

The previous prime is 20953717. The next prime is 20953811. The reversal of 20953719 is 91735902.

It is not a de Polignac number, because 20953719 - 2¹ = 20953717 is a prime.

It is a super-2 number, since 2×20953719² = 878116679861922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7602 + ... + 9984.

It is an arithmetic number, because the mean of its divisors is an integer number (2525848).

Almost surely, 2^20953719 is an apocalyptic number.

20953719 is a deficient number, since it is larger than the sum of its proper divisors (9356457).

20953719 is a wasteful number, since it uses less digits than its factorization.

20953719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366 (or 3363 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 20953719 is about 4577.5232386084. The cubic root of 20953719 is about 275.6895927409.

The spelling of 20953719 in words is "twenty million, nine hundred fifty-three thousand, seven hundred nineteen".