21896678292 has 24 divisors (see below), whose sum is σ = 52473122016. Its totient is φ = 7101625248.

The previous prime is 21896678267. The next prime is 21896678299. The reversal of 21896678292 is 29287669812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21896678299) 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, 24657978 + ... + 24658865.

It is an arithmetic number, because the mean of its divisors is an integer number (2186380084).

Almost surely, 2^21896678292 is an apocalyptic number.

It is an amenable number.

21896678292 is an abundant number, since it is smaller than the sum of its proper divisors (30576443724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21896678292 is a wasteful number, since it uses less digits than its factorization.

21896678292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49316887 (or 49316885 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The spelling of 21896678292 in words is "twenty-one billion, eight hundred ninety-six million, six hundred seventy-eight thousand, two hundred ninety-two".