20205470 has 8 divisors (see below), whose sum is σ = 36369864. Its totient is φ = 8082184.

The previous prime is 20205467. The next prime is 20205481. The reversal of 20205470 is 7450202.

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

It is a super-2 number, since 2×20205470² = 816522035841800, which contains 22 as substring.

It is a congruent number.

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, 1010264 + ... + 1010283.

It is an arithmetic number, because the mean of its divisors is an integer number (4546233).

Almost surely, 2^20205470 is an apocalyptic number.

20205470 is a deficient number, since it is larger than the sum of its proper divisors (16164394).

20205470 is a wasteful number, since it uses less digits than its factorization.

20205470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020554.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20205470 is about 4495.0494991713. The cubic root of 20205470 is about 272.3681487653.

Adding to 20205470 its reverse (7450202), we get a palindrome (27655672).

The spelling of 20205470 in words is "twenty million, two hundred five thousand, four hundred seventy".