21077343 has 12 divisors (see below), whose sum is σ = 34794448. Its totient is φ = 12044160.

The previous prime is 21077339. The next prime is 21077347. The reversal of 21077343 is 34377012.

It is an interprime number because it is at equal distance from previous prime (21077339) and next prime (21077347).

It is not a de Polignac number, because 21077343 - 2² = 21077339 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 (21077347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167218 + ... + 167343.

Almost surely, 2^21077343 is an apocalyptic number.

21077343 is a deficient number, since it is larger than the sum of its proper divisors (13717105).

21077343 is a wasteful number, since it uses less digits than its factorization.

21077343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334574 (or 334571 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 21077343 is about 4591.0067523366. The cubic root of 21077343 is about 276.2307065960.

The spelling of 21077343 in words is "twenty-one million, seventy-seven thousand, three hundred forty-three".