21460454 has 4 divisors (see below), whose sum is σ = 32190684. Its totient is φ = 10730226.

The previous prime is 21460447. The next prime is 21460459. The reversal of 21460454 is 45406412.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21460454² = 921102171772232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5365112 + ... + 5365115.

It is an arithmetic number, because the mean of its divisors is an integer number (8047671).

Almost surely, 2^21460454 is an apocalyptic number.

21460454 is a deficient number, since it is larger than the sum of its proper divisors (10730230).

21460454 is a wasteful number, since it uses less digits than its factorization.

21460454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10730229.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 21460454 is about 4632.5429301842. The cubic root of 21460454 is about 277.8942975816.

Adding to 21460454 its reverse (45406412), we get a palindrome (66866866).

The spelling of 21460454 in words is "twenty-one million, four hundred sixty thousand, four hundred fifty-four".