20752117678 has 8 divisors (see below), whose sum is σ = 32481575568. Its totient is φ = 9924925824.

The previous prime is 20752117643. The next prime is 20752117679. The reversal of 20752117678 is 87671125702.

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

It is a super-2 number, since 2×20752117678² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 451132993 = 20752117678 / (2 + 0 + 7 + 5 + 2 + 1 + 1 + 7 + 6 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20752117679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225566451 + ... + 225566542.

It is an arithmetic number, because the mean of its divisors is an integer number (4060196946).

Almost surely, 2^20752117678 is an apocalyptic number.

20752117678 is a deficient number, since it is larger than the sum of its proper divisors (11729457890).

20752117678 is a wasteful number, since it uses less digits than its factorization.

20752117678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451133018.

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 20752117678 in words is "twenty billion, seven hundred fifty-two million, one hundred seventeen thousand, six hundred seventy-eight".