21374773 has 8 divisors (see below), whose sum is σ = 24539648. Its totient is φ = 18237744.

The previous prime is 21374767. The next prime is 21374783. The reversal of 21374773 is 37747312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21374773 - 2¹³ = 21366581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374713) 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, 5286 + ... + 8407.

It is an arithmetic number, because the mean of its divisors is an integer number (3067456).

Almost surely, 2^21374773 is an apocalyptic number.

It is an amenable number.

21374773 is a deficient number, since it is larger than the sum of its proper divisors (3164875).

21374773 is a wasteful number, since it uses less digits than its factorization.

21374773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13923.

The product of its digits is 24696, while the sum is 34.

The square root of 21374773 is about 4623.2859526532. The cubic root of 21374773 is about 277.5239727146.

The spelling of 21374773 in words is "twenty-one million, three hundred seventy-four thousand, seven hundred seventy-three".