20722070 has 8 divisors (see below), whose sum is σ = 37299744. Its totient is φ = 8288824.

The previous prime is 20722007. The next prime is 20722073. The reversal of 20722070 is 7022702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20722073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036094 + ... + 1036113.

It is an arithmetic number, because the mean of its divisors is an integer number (4662468).

Almost surely, 2^20722070 is an apocalyptic number.

20722070 is a deficient number, since it is larger than the sum of its proper divisors (16577674).

20722070 is a wasteful number, since it uses less digits than its factorization.

20722070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072214.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 20722070 is about 4552.1500414639. The cubic root of 20722070 is about 274.6698848740.

Adding to 20722070 its reverse (7022702), we get a palindrome (27744772).

The spelling of 20722070 in words is "twenty million, seven hundred twenty-two thousand, seventy".