20807064 has 32 divisors (see below), whose sum is σ = 57798000. Its totient is φ = 6935616.

The previous prime is 20807011. The next prime is 20807069. The reversal of 20807064 is 46070802.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20807069) 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, 47949 + ... + 48380.

Almost surely, 2^20807064 is an apocalyptic number.

20807064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20807064 is an abundant number, since it is smaller than the sum of its proper divisors (36990936).

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

20807064 is a wasteful number, since it uses less digits than its factorization.

20807064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96344 (or 96334 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20807064 is about 4561.4760768856. The cubic root of 20807064 is about 275.0449028606.

Adding to 20807064 its reverse (46070802), we get a palindrome (66877866).

The spelling of 20807064 in words is "twenty million, eight hundred seven thousand, sixty-four".