20667696 has 40 divisors (see below), whose sum is σ = 61019904. Its totient is φ = 5904960.

The previous prime is 20667679. The next prime is 20667697. The reversal of 20667696 is 69676602.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20667697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30420 + ... + 31091.

Almost surely, 2^20667696 is an apocalyptic number.

It is an amenable number.

20667696 is an abundant number, since it is smaller than the sum of its proper divisors (40352208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20667696 is a wasteful number, since it uses less digits than its factorization.

20667696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61529 (or 61523 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 20667696 is about 4546.1737758251. The cubic root of 20667696 is about 274.4294329905.

The spelling of 20667696 in words is "twenty million, six hundred sixty-seven thousand, six hundred ninety-six".