21377483 has 4 divisors (see below), whose sum is σ = 22635000. Its totient is φ = 20119968.

The previous prime is 21377459. The next prime is 21377501. The reversal of 21377483 is 38477312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21377483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21377183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628733 + ... + 628766.

It is an arithmetic number, because the mean of its divisors is an integer number (5658750).

Almost surely, 2^21377483 is an apocalyptic number.

21377483 is a deficient number, since it is larger than the sum of its proper divisors (1257517).

21377483 is a wasteful number, since it uses less digits than its factorization.

21377483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257516.

The product of its digits is 28224, while the sum is 35.

The square root of 21377483 is about 4623.5790249546. The cubic root of 21377483 is about 277.5357008420.

The spelling of 21377483 in words is "twenty-one million, three hundred seventy-seven thousand, four hundred eighty-three".