20757070 has 16 divisors (see below), whose sum is σ = 38274768. Its totient is φ = 8100160.

The previous prime is 20757049. The next prime is 20757071. The reversal of 20757070 is 7075702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20757071) 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, 24904 + ... + 25723.

It is an arithmetic number, because the mean of its divisors is an integer number (2392173).

Almost surely, 2^20757070 is an apocalyptic number.

20757070 is a deficient number, since it is larger than the sum of its proper divisors (17517698).

20757070 is a wasteful number, since it uses less digits than its factorization.

20757070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50675.

The product of its (nonzero) digits is 3430, while the sum is 28.

The square root of 20757070 is about 4555.9927567985. The cubic root of 20757070 is about 274.8244389091.

The spelling of 20757070 in words is "twenty million, seven hundred fifty-seven thousand, seventy".