21494626 has 8 divisors (see below), whose sum is σ = 33353820. Its totient is φ = 10376688.

The previous prime is 21494621. The next prime is 21494633. The reversal of 21494626 is 62649412.

It can be written as a sum of positive squares in 2 ways, for example, as 20930625 + 564001 = 4575^2 + 751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21494591 and 21494600.

It is not an unprimeable number, because it can be changed into a prime (21494621) 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, 185241 + ... + 185356.

Almost surely, 2^21494626 is an apocalyptic number.

21494626 is a deficient number, since it is larger than the sum of its proper divisors (11859194).

21494626 is a wasteful number, since it uses less digits than its factorization.

21494626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370628.

The product of its digits is 20736, while the sum is 34.

The square root of 21494626 is about 4636.2297182085. The cubic root of 21494626 is about 278.0417186326.

The spelling of 21494626 in words is "twenty-one million, four hundred ninety-four thousand, six hundred twenty-six".