20770064 has 40 divisors (see below), whose sum is σ = 46872000. Its totient is φ = 8731008.

The previous prime is 20770049. The next prime is 20770109. The reversal of 20770064 is 46007702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4187 + ... + 7685.

It is an arithmetic number, because the mean of its divisors is an integer number (1171800).

Almost surely, 2^20770064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20770064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23436000).

20770064 is an abundant number, since it is smaller than the sum of its proper divisors (26101936).

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

20770064 is a wasteful number, since it uses less digits than its factorization.

20770064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567 (or 3561 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20770064 is about 4557.4185675665. The cubic root of 20770064 is about 274.8817739738.

Adding to 20770064 its reverse (46007702), we get a palindrome (66777766).

The spelling of 20770064 in words is "twenty million, seven hundred seventy thousand, sixty-four".