20218248897 has 32 divisors (see below), whose sum is σ = 35378488320. Its totient is φ = 9950195520.

The previous prime is 20218248889. The next prime is 20218248907. The reversal of 20218248897 is 79884281202.

It is not a de Polignac number, because 20218248897 - 2³ = 20218248889 is a prime.

It is a super-2 number, since 2×20218248897² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20218248857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2298898 + ... + 2307675.

It is an arithmetic number, because the mean of its divisors is an integer number (1105577760).

Almost surely, 2^20218248897 is an apocalyptic number.

It is an amenable number.

20218248897 is a deficient number, since it is larger than the sum of its proper divisors (15160239423).

20218248897 is a wasteful number, since it uses less digits than its factorization.

20218248897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606613.

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 20218248897 in words is "twenty billion, two hundred eighteen million, two hundred forty-eight thousand, eight hundred ninety-seven".