21454354 has 16 divisors (see below), whose sum is σ = 34058880. Its totient is φ = 10114720.

The previous prime is 21454333. The next prime is 21454373. The reversal of 21454354 is 45345412.

It is a super-4 number, since 4×21454354⁴ (a number of 30 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19 + ... + 6550.

It is an arithmetic number, because the mean of its divisors is an integer number (2128680).

Almost surely, 2^21454354 is an apocalyptic number.

21454354 is a deficient number, since it is larger than the sum of its proper divisors (12604526).

21454354 is a wasteful number, since it uses less digits than its factorization.

21454354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665.

The product of its digits is 9600, while the sum is 28.

The square root of 21454354 is about 4631.8844976964. The cubic root of 21454354 is about 277.8679651805.

Adding to 21454354 its reverse (45345412), we get a palindrome (66799766).

The spelling of 21454354 in words is "twenty-one million, four hundred fifty-four thousand, three hundred fifty-four".