20725838570 has 8 divisors (see below), whose sum is σ = 37306509444. Its totient is φ = 8290335424.

The previous prime is 20725838569. The next prime is 20725838587. The reversal of 20725838570 is 7583852702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20721890401 + 3948169 = 143951^2 + 1987^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036291919 + ... + 1036291938.

Almost surely, 2^20725838570 is an apocalyptic number.

20725838570 is a deficient number, since it is larger than the sum of its proper divisors (16580670874).

20725838570 is a wasteful number, since it uses less digits than its factorization.

20725838570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072583864.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 20725838570 in words is "twenty billion, seven hundred twenty-five million, eight hundred thirty-eight thousand, five hundred seventy".