21377852 has 12 divisors (see below), whose sum is σ = 37455936. Its totient is φ = 10676160.

The previous prime is 21377827. The next prime is 21377861. The reversal of 21377852 is 25877312.

It is a super-2 number, since 2×21377852² = 914025112267808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268 + ... + 6660.

It is an arithmetic number, because the mean of its divisors is an integer number (3121328).

Almost surely, 2^21377852 is an apocalyptic number.

It is an amenable number.

21377852 is a deficient number, since it is larger than the sum of its proper divisors (16078084).

21377852 is a wasteful number, since it uses less digits than its factorization.

21377852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388 (or 6386 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 21377852 is about 4623.6189289343. The cubic root of 21377852 is about 277.5372976949.

The spelling of 21377852 in words is "twenty-one million, three hundred seventy-seven thousand, eight hundred fifty-two".