21462463 has 4 divisors (see below), whose sum is σ = 23413608. Its totient is φ = 19511320.

The previous prime is 21462443. The next prime is 21462487. The reversal of 21462463 is 36426412.

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-21462463 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 (21462433) 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, 975556 + ... + 975577.

It is an arithmetic number, because the mean of its divisors is an integer number (5853402).

Almost surely, 2^21462463 is an apocalyptic number.

21462463 is a deficient number, since it is larger than the sum of its proper divisors (1951145).

21462463 is a wasteful number, since it uses less digits than its factorization.

21462463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951144.

The product of its digits is 6912, while the sum is 28.

The square root of 21462463 is about 4632.7597606610. The cubic root of 21462463 is about 277.9029689146.

Adding to 21462463 its reverse (36426412), we get a palindrome (57888875).

The spelling of 21462463 in words is "twenty-one million, four hundred sixty-two thousand, four hundred sixty-three".