20070756 has 18 divisors (see below), whose sum is σ = 50734502. Its totient is φ = 6690240.

The previous prime is 20070751. The next prime is 20070763. The reversal of 20070756 is 65707002.

It can be written as a sum of positive squares in only one way, i.e., 12320100 + 7750656 = 3510^2 + 2784^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (20070751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278725 + ... + 278796.

Almost surely, 2^20070756 is an apocalyptic number.

It is an amenable number.

20070756 is an abundant number, since it is smaller than the sum of its proper divisors (30663746).

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

20070756 is a wasteful number, since it uses less digits than its factorization.

20070756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557531 (or 557526 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 20070756 is about 4480.0397319667. The cubic root of 20070756 is about 271.7614871353.

Adding to 20070756 its reverse (65707002), we get a palindrome (85777758).

The spelling of 20070756 in words is "twenty million, seventy thousand, seven hundred fifty-six".