20905026 has 8 divisors (see below), whose sum is σ = 41810064. Its totient is φ = 6968340.

The previous prime is 20905007. The next prime is 20905033. The reversal of 20905026 is 62050902.

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

20905026 is an admirable number.

It is a super-2 number, since 2×20905026² = 874040224121352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20904987 and 20905005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742080 + ... + 1742091.

It is an arithmetic number, because the mean of its divisors is an integer number (5226258).

Almost surely, 2^20905026 is an apocalyptic number.

20905026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20905026 is a wasteful number, since it uses less digits than its factorization.

20905026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484176.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20905026 is about 4572.2014391319. The cubic root of 20905026 is about 275.4758746687.

Adding to 20905026 its reverse (62050902), we get a palindrome (82955928).

The spelling of 20905026 in words is "twenty million, nine hundred five thousand, twenty-six".