20770072 has 16 divisors (see below), whose sum is σ = 39024000. Its totient is φ = 10363680.

The previous prime is 20770049. The next prime is 20770109. The reversal of 20770072 is 27007702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1929 + ... + 6727.

It is an arithmetic number, because the mean of its divisors is an integer number (2439000).

Almost surely, 2^20770072 is an apocalyptic number.

It is an amenable number.

20770072 is a deficient number, since it is larger than the sum of its proper divisors (18253928).

20770072 is a wasteful number, since it uses less digits than its factorization.

20770072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5346 (or 5342 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 25.

The square root of 20770072 is about 4557.4194452563. The cubic root of 20770072 is about 274.8818092658.

Adding to 20770072 its reverse (27007702), we get a palindrome (47777774).

The spelling of 20770072 in words is "twenty million, seven hundred seventy thousand, seventy-two".