20962660417 has 4 divisors (see below), whose sum is σ = 20991495616. Its totient is φ = 20933825220.

The previous prime is 20962660409. The next prime is 20962660427. The reversal of 20962660417 is 71406626902.

It is a happy number.

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 20962660417 - 2³ = 20962660409 is a prime.

It is a super-2 number, since 2×20962660417² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20962660427) 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, 14416509 + ... + 14417962.

It is an arithmetic number, because the mean of its divisors is an integer number (5247873904).

Almost surely, 2^20962660417 is an apocalyptic number.

It is an amenable number.

20962660417 is a deficient number, since it is larger than the sum of its proper divisors (28835199).

20962660417 is an equidigital number, since it uses as much as digits as its factorization.

20962660417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28835198.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 20962660417 in words is "twenty billion, nine hundred sixty-two million, six hundred sixty thousand, four hundred seventeen".