20725995577 has 8 divisors (see below), whose sum is σ = 23921376192. Its totient is φ = 17589246000.

The previous prime is 20725995547. The next prime is 20725995607. The reversal of 20725995577 is 77559952702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20725995547) and next prime (20725995607).

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 20725995577 - 2⁷ = 20725995449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20725995547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14656999 + ... + 14658412.

It is an arithmetic number, because the mean of its divisors is an integer number (2990172024).

Almost surely, 2^20725995577 is an apocalyptic number.

It is an amenable number.

20725995577 is a deficient number, since it is larger than the sum of its proper divisors (3195380615).

20725995577 is a wasteful number, since it uses less digits than its factorization.

20725995577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29315519.

The product of its (nonzero) digits is 13891500, while the sum is 58.

The spelling of 20725995577 in words is "twenty billion, seven hundred twenty-five million, nine hundred ninety-five thousand, five hundred seventy-seven".