20244657081 has 8 divisors (see below), whose sum is σ = 29446773984. Its totient is φ = 12269489120.

The previous prime is 20244657071. The next prime is 20244657101. The reversal of 20244657081 is 18075644202.

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 20244657081 - 2⁹ = 20244656569 is a prime.

It is a super-2 number, since 2×20244657081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20244657031) 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, 306737196 + ... + 306737261.

It is an arithmetic number, because the mean of its divisors is an integer number (3680846748).

Almost surely, 2^20244657081 is an apocalyptic number.

It is an amenable number.

20244657081 is a deficient number, since it is larger than the sum of its proper divisors (9202116903).

20244657081 is a wasteful number, since it uses less digits than its factorization.

20244657081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613474471.

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 20244657081 in words is "twenty billion, two hundred forty-four million, six hundred fifty-seven thousand, eighty-one".