21270058373 has 4 divisors (see below), whose sum is σ = 21397424160. Its totient is φ = 21142692588.

The previous prime is 21270058357. The next prime is 21270058393. The reversal of 21270058373 is 37385007212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21270058373 - 2⁴ = 21270058357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21270058333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63682643 + ... + 63682976.

It is an arithmetic number, because the mean of its divisors is an integer number (5349356040).

Almost surely, 2^21270058373 is an apocalyptic number.

It is an amenable number.

21270058373 is a deficient number, since it is larger than the sum of its proper divisors (127365787).

21270058373 is a wasteful number, since it uses less digits than its factorization.

21270058373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127365786.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 21270058373 in words is "twenty-one billion, two hundred seventy million, fifty-eight thousand, three hundred seventy-three".