20725313147 has 8 divisors (see below), whose sum is σ = 25839351552. Its totient is φ = 16149594600.

The previous prime is 20725313137. The next prime is 20725313171. The reversal of 20725313147 is 74131352702.

It is a happy number.

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 20725313147 - 2⁴ = 20725313131 is a prime.

It is a super-2 number, since 2×20725313147² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20725313117) 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, 134579879 + ... + 134580032.

It is an arithmetic number, because the mean of its divisors is an integer number (3229918944).

Almost surely, 2^20725313147 is an apocalyptic number.

20725313147 is a deficient number, since it is larger than the sum of its proper divisors (5114038405).

20725313147 is a wasteful number, since it uses less digits than its factorization.

20725313147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269159929.

The product of its (nonzero) digits is 35280, while the sum is 35.

Adding to 20725313147 its reverse (74131352702), we get a palindrome (94856665849).

The spelling of 20725313147 in words is "twenty billion, seven hundred twenty-five million, three hundred thirteen thousand, one hundred forty-seven".