20436070 has 16 divisors (see below), whose sum is σ = 37568448. Its totient is φ = 8000320.

The previous prime is 20436049. The next prime is 20436071. The reversal of 20436070 is 7063402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20436071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21271 + ... + 22210.

It is an arithmetic number, because the mean of its divisors is an integer number (2348028).

Almost surely, 2^20436070 is an apocalyptic number.

20436070 is a deficient number, since it is larger than the sum of its proper divisors (17132378).

20436070 is a wasteful number, since it uses less digits than its factorization.

20436070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43535.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20436070 is about 4520.6271688782. The cubic root of 20436070 is about 273.4003884001.

Adding to 20436070 its reverse (7063402), we get a palindrome (27499472).

The spelling of 20436070 in words is "twenty million, four hundred thirty-six thousand, seventy".