21077463 has 16 divisors (see below), whose sum is σ = 31118976. Its totient is φ = 12582240.

The previous prime is 21077449. The next prime is 21077477. The reversal of 21077463 is 36477012.

It is an interprime number because it is at equal distance from previous prime (21077449) and next prime (21077477).

It is not a de Polignac number, because 21077463 - 2⁴ = 21077447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21077463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21077963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2556 + ... + 6977.

It is an arithmetic number, because the mean of its divisors is an integer number (1944936).

Almost surely, 2^21077463 is an apocalyptic number.

21077463 is a deficient number, since it is larger than the sum of its proper divisors (10041513).

21077463 is a wasteful number, since it uses less digits than its factorization.

21077463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 21077463 is about 4591.0198213469. The cubic root of 21077463 is about 276.2312308181.

The spelling of 21077463 in words is "twenty-one million, seventy-seven thousand, four hundred sixty-three".