21271740354 has 24 divisors (see below), whose sum is σ = 46776665520. Its totient is φ = 6984750168.

The previous prime is 21271740299. The next prime is 21271740361. The reversal of 21271740354 is 45304717212.

21271740354 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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, 8817924 + ... + 8820335.

It is an arithmetic number, because the mean of its divisors is an integer number (1949027730).

Almost surely, 2^21271740354 is an apocalyptic number.

21271740354 is an abundant number, since it is smaller than the sum of its proper divisors (25504925166).

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

21271740354 is a wasteful number, since it uses less digits than its factorization.

21271740354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17638334 (or 17638331 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 21271740354 in words is "twenty-one billion, two hundred seventy-one million, seven hundred forty thousand, three hundred fifty-four".