21154348 has 6 divisors (see below), whose sum is σ = 37020116. Its totient is φ = 10577172.

The previous prime is 21154339. The next prime is 21154381. The reversal of 21154348 is 84345112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2644290 + ... + 2644297.

Almost surely, 2^21154348 is an apocalyptic number.

It is an amenable number.

21154348 is a deficient number, since it is larger than the sum of its proper divisors (15865768).

21154348 is a wasteful number, since it uses less digits than its factorization.

21154348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288591 (or 5288589 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 21154348 is about 4599.3856111442. The cubic root of 21154348 is about 276.5666960305.

The spelling of 21154348 in words is "twenty-one million, one hundred fifty-four thousand, three hundred forty-eight".