20965437669 has 16 divisors (see below), whose sum is σ = 30499789824. Its totient is φ = 12704406000.

The previous prime is 20965437667. The next prime is 20965437739. The reversal of 20965437669 is 96673456902.

It is not a de Polignac number, because 20965437669 - 2¹ = 20965437667 is a prime.

It is a super-2 number, since 2×20965437669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20965437667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191562 + ... + 280404.

It is an arithmetic number, because the mean of its divisors is an integer number (1906236864).

Almost surely, 2^20965437669 is an apocalyptic number.

It is an amenable number.

20965437669 is a deficient number, since it is larger than the sum of its proper divisors (9534352155).

20965437669 is a wasteful number, since it uses less digits than its factorization.

20965437669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96008.

The product of its (nonzero) digits is 14696640, while the sum is 57.

The spelling of 20965437669 in words is "twenty billion, nine hundred sixty-five million, four hundred thirty-seven thousand, six hundred sixty-nine".