20007975247 has 8 divisors (see below), whose sum is σ = 22005498816. Its totient is φ = 18075944352.

The previous prime is 20007975217. The next prime is 20007975263. The reversal of 20007975247 is 74257970002.

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

It is a cyclic number.

It is not a de Polignac number, because 20007975247 - 2²³ = 19999586639 is a prime.

It is a super-2 number, since 2×20007975247² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007975217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16372528 + ... + 16373749.

It is an arithmetic number, because the mean of its divisors is an integer number (2750687352).

Almost surely, 2^20007975247 is an apocalyptic number.

20007975247 is a deficient number, since it is larger than the sum of its proper divisors (1997523569).

20007975247 is a wasteful number, since it uses less digits than its factorization.

20007975247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32746337.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 20007975247 in words is "twenty billion, seven million, nine hundred seventy-five thousand, two hundred forty-seven".