20664002546 has 16 divisors (see below), whose sum is σ = 33816037248. Its totient is φ = 9392113200.

The previous prime is 20664002531. The next prime is 20664002561. The reversal of 20664002546 is 64520046602.

It is an interprime number because it is at equal distance from previous prime (20664002531) and next prime (20664002561).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601736 + ... + 635148.

It is an arithmetic number, because the mean of its divisors is an integer number (2113502328).

Almost surely, 2^20664002546 is an apocalyptic number.

20664002546 is a deficient number, since it is larger than the sum of its proper divisors (13152034702).

20664002546 is a wasteful number, since it uses less digits than its factorization.

20664002546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61537.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20664002546 in words is "twenty billion, six hundred sixty-four million, two thousand, five hundred forty-six".