16720051 has 8 divisors (see below), whose sum is σ = 17084864. Its totient is φ = 16358760.

The previous prime is 16720049. The next prime is 16720063. The reversal of 16720051 is 15002761.

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

It is a cyclic number.

It is not a de Polignac number, because 16720051 - 2¹ = 16720049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16720021) 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, 10156 + ... + 11686.

It is an arithmetic number, because the mean of its divisors is an integer number (2135608).

Almost surely, 2^16720051 is an apocalyptic number.

16720051 is a deficient number, since it is larger than the sum of its proper divisors (364813).

16720051 is a wasteful number, since it uses less digits than its factorization.

16720051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 16720051 is about 4089.0158962763. The cubic root of 16720051 is about 255.7089129167.

The spelling of 16720051 in words is "sixteen million, seven hundred twenty thousand, fifty-one".