21114550278 has 24 divisors (see below), whose sum is σ = 45755814000. Its totient is φ = 7037010864.

The previous prime is 21114550267. The next prime is 21114550313. The reversal of 21114550278 is 87205541112.

It is a happy number.

21114550278 is a `hidden beast` number, since 2 + 1 + 1 + 145 + 502 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16968 + ... + 206196.

It is an arithmetic number, because the mean of its divisors is an integer number (1906492250).

Almost surely, 2^21114550278 is an apocalyptic number.

21114550278 is an abundant number, since it is smaller than the sum of its proper divisors (24641263722).

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

21114550278 is a wasteful number, since it uses less digits than its factorization.

21114550278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195436 (or 195433 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 21114550278 in words is "twenty-one billion, one hundred fourteen million, five hundred fifty thousand, two hundred seventy-eight".