20725210605 has 64 divisors (see below), whose sum is σ = 36912589056. Its totient is φ = 9845760000.

The previous prime is 20725210591. The next prime is 20725210609. The reversal of 20725210605 is 50601252702.

It is not a de Polignac number, because 20725210605 - 2⁵ = 20725210573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725210609) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1610095 + ... + 1622915.

It is an arithmetic number, because the mean of its divisors is an integer number (576759204).

Almost surely, 2^20725210605 is an apocalyptic number.

It is an amenable number.

20725210605 is a deficient number, since it is larger than the sum of its proper divisors (16187378451).

20725210605 is a wasteful number, since it uses less digits than its factorization.

20725210605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13038.

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 20725210605 in words is "twenty billion, seven hundred twenty-five million, two hundred ten thousand, six hundred five".