20716770 has 32 divisors (see below), whose sum is σ = 49932288. Its totient is φ = 5500928.

The previous prime is 20716769. The next prime is 20716789. The reversal of 20716770 is 7761702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6367 + ... + 9053.

It is an arithmetic number, because the mean of its divisors is an integer number (1560384).

Almost surely, 2^20716770 is an apocalyptic number.

20716770 is an abundant number, since it is smaller than the sum of its proper divisors (29215518).

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

20716770 is a wasteful number, since it uses less digits than its factorization.

20716770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954.

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 20716770 is about 4551.5678617373. The cubic root of 20716770 is about 274.6464658089.

The spelling of 20716770 in words is "twenty million, seven hundred sixteen thousand, seven hundred seventy".