20626394 has 8 divisors (see below), whose sum is σ = 30960468. Its totient is φ = 10306240.

The previous prime is 20626391. The next prime is 20626399. The reversal of 20626394 is 49362602.

It can be written as a sum of positive squares in 2 ways, for example, as 20584369 + 42025 = 4537^2 + 205^2 .

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

It is a super-3 number, since 3×20626394³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20626394.

It is not an unprimeable number, because it can be changed into a prime (20626391) 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, 1874 + ... + 6690.

Almost surely, 2^20626394 is an apocalyptic number.

20626394 is a deficient number, since it is larger than the sum of its proper divisors (10334074).

20626394 is a wasteful number, since it uses less digits than its factorization.

20626394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 20626394 is about 4541.6290029019. The cubic root of 20626394 is about 274.2465059231.

Adding to 20626394 its reverse (49362602), we get a palindrome (69988996).

The spelling of 20626394 in words is "twenty million, six hundred twenty-six thousand, three hundred ninety-four".