20351064 has 32 divisors (see below), whose sum is σ = 51715440. Its totient is φ = 6672000.

The previous prime is 20351053. The next prime is 20351077. The reversal of 20351064 is 46015302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20351064.

It is a congruent number.

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, 5487 + ... + 8414.

Almost surely, 2^20351064 is an apocalyptic number.

20351064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20351064 is an abundant number, since it is smaller than the sum of its proper divisors (31364376).

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

20351064 is a wasteful number, since it uses less digits than its factorization.

20351064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13971 (or 13967 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20351064 is about 4511.2153573067. The cubic root of 20351064 is about 273.0207822738.

Adding to 20351064 its reverse (46015302), we get a palindrome (66366366).

The spelling of 20351064 in words is "twenty million, three hundred fifty-one thousand, sixty-four".