20888248849 has 16 divisors (see below), whose sum is σ = 23601378304. Its totient is φ = 18353563200.

The previous prime is 20888248841. The next prime is 20888248877. The reversal of 20888248849 is 94884288802.

It is a cyclic number.

It is not a de Polignac number, because 20888248849 - 2³ = 20888248841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is not an unprimeable number, because it can be changed into a prime (20888248841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400269 + ... + 449434.

It is an arithmetic number, because the mean of its divisors is an integer number (1475086144).

Almost surely, 2^20888248849 is an apocalyptic number.

It is an amenable number.

20888248849 is a deficient number, since it is larger than the sum of its proper divisors (2713129455).

20888248849 is a wasteful number, since it uses less digits than its factorization.

20888248849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849808.

The product of its (nonzero) digits is 18874368, while the sum is 61.

The spelling of 20888248849 in words is "twenty billion, eight hundred eighty-eight million, two hundred forty-eight thousand, eight hundred forty-nine".