20757575007 has 24 divisors (see below), whose sum is σ = 32329523408. Its totient is φ = 12758083200.

The previous prime is 20757574969. The next prime is 20757575009. The reversal of 20757575007 is 70057575702.

20757575007 is a `hidden beast` number, since 2 + 0 + 7 + 575 + 75 + 0 + 0 + 7 = 666.

It is not a de Polignac number, because 20757575007 - 2²⁶ = 20690466143 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20757575009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14494 + ... + 204267.

Almost surely, 2^20757575007 is an apocalyptic number.

20757575007 is a deficient number, since it is larger than the sum of its proper divisors (11571948401).

20757575007 is a wasteful number, since it uses less digits than its factorization.

20757575007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219591 (or 219588 counting only the distinct ones).

The product of its (nonzero) digits is 600250, while the sum is 45.

The spelling of 20757575007 in words is "twenty billion, seven hundred fifty-seven million, five hundred seventy-five thousand, seven".