20966501 has 8 divisors (see below), whose sum is σ = 22026624. Its totient is φ = 19918800.

The previous prime is 20966479. The next prime is 20966537. The reversal of 20966501 is 10566902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20966501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20966551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (2753328).

Almost surely, 2^20966501 is an apocalyptic number.

It is an amenable number.

20966501 is a deficient number, since it is larger than the sum of its proper divisors (1060123).

20966501 is a wasteful number, since it uses less digits than its factorization.

20966501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20966501 is about 4578.9191956181. The cubic root of 20966501 is about 275.7456392449.

The spelling of 20966501 in words is "twenty million, nine hundred sixty-six thousand, five hundred one".