21557370337270 has 32 divisors (see below), whose sum is σ = 40098793664160. Its totient is φ = 8339024198400.

The previous prime is 21557370337253. The next prime is 21557370337289. The reversal of 21557370337270 is 7273307375512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248141815 + ... + 248228674.

It is an arithmetic number, because the mean of its divisors is an integer number (1253087302005).

Almost surely, 2^{21557370337270} is an apocalyptic number.

21557370337270 is a deficient number, since it is larger than the sum of its proper divisors (18541423326890).

21557370337270 is a wasteful number, since it uses less digits than its factorization.

21557370337270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496370640.

The product of its (nonzero) digits is 6482700, while the sum is 52.

The spelling of 21557370337270 in words is "twenty-one trillion, five hundred fifty-seven billion, three hundred seventy million, three hundred thirty-seven thousand, two hundred seventy".