21348934 has 4 divisors (see below), whose sum is σ = 32023404. Its totient is φ = 10674466.

The previous prime is 21348911. The next prime is 21348953. The reversal of 21348934 is 43984312.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×21348934³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21348934.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5337232 + ... + 5337235.

It is an arithmetic number, because the mean of its divisors is an integer number (8005851).

Almost surely, 2^21348934 is an apocalyptic number.

21348934 is a deficient number, since it is larger than the sum of its proper divisors (10674470).

21348934 is a wasteful number, since it uses less digits than its factorization.

21348934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10674469.

The product of its digits is 20736, while the sum is 34.

The square root of 21348934 is about 4620.4906665851. The cubic root of 21348934 is about 277.4120988806.

The spelling of 21348934 in words is "twenty-one million, three hundred forty-eight thousand, nine hundred thirty-four".