20725086405 has 8 divisors (see below), whose sum is σ = 33160138272. Its totient is φ = 11053379408.

The previous prime is 20725086367. The next prime is 20725086407. The reversal of 20725086405 is 50468052702.

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 20725086405 - 2⁶ = 20725086341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725086407) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 690836199 + ... + 690836228.

It is an arithmetic number, because the mean of its divisors is an integer number (4145017284).

Almost surely, 2^20725086405 is an apocalyptic number.

It is an amenable number.

20725086405 is a deficient number, since it is larger than the sum of its proper divisors (12435051867).

20725086405 is a wasteful number, since it uses less digits than its factorization.

20725086405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381672435.

The product of its (nonzero) digits is 134400, while the sum is 39.

The spelling of 20725086405 in words is "twenty billion, seven hundred twenty-five million, eighty-six thousand, four hundred five".