21373077 has 24 divisors (see below), whose sum is σ = 31698688. Its totient is φ = 12798720.

The previous prime is 21373069. The next prime is 21373103. The reversal of 21373077 is 77037312.

It is not a de Polignac number, because 21373077 - 2³ = 21373069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34908 + ... + 35514.

Almost surely, 2^21373077 is an apocalyptic number.

It is an amenable number.

21373077 is a deficient number, since it is larger than the sum of its proper divisors (10325611).

21373077 is a wasteful number, since it uses less digits than its factorization.

21373077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 30.

The square root of 21373077 is about 4623.1025296872. The cubic root of 21373077 is about 277.5166323932.

The spelling of 21373077 in words is "twenty-one million, three hundred seventy-three thousand, seventy-seven".