20597869281 has 8 divisors (see below), whose sum is σ = 29960537184. Its totient is φ = 12483557120.

The previous prime is 20597869267. The next prime is 20597869283. The reversal of 20597869281 is 18296879502.

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 20597869281 - 2⁵ = 20597869249 is a prime.

It is a super-2 number, since 2×20597869281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20597869283) 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, 312088896 + ... + 312088961.

It is an arithmetic number, because the mean of its divisors is an integer number (3745067148).

Almost surely, 2^20597869281 is an apocalyptic number.

It is an amenable number.

20597869281 is a deficient number, since it is larger than the sum of its proper divisors (9362667903).

20597869281 is a wasteful number, since it uses less digits than its factorization.

20597869281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624177871.

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 20597869281 in words is "twenty billion, five hundred ninety-seven million, eight hundred sixty-nine thousand, two hundred eighty-one".