1020900064 has 24 divisors (see below), whose sum is σ = 2011253328. Its totient is φ = 510105600.

The previous prime is 1020900061. The next prime is 1020900073. The reversal of 1020900064 is 4600090201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020900061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41269 + ... + 61195.

It is an arithmetic number, because the mean of its divisors is an integer number (83802222).

Almost surely, 2^1020900064 is an apocalyptic number.

It is an amenable number.

1020900064 is a deficient number, since it is larger than the sum of its proper divisors (990353264).

1020900064 is a wasteful number, since it uses less digits than its factorization.

1020900064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21538 (or 21530 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1020900064 is about 31951.5267866811. The cubic root of 1020900064 is about 1006.9187090687.

Adding to 1020900064 its reverse (4600090201), we get a palindrome (5620990265).

The spelling of 1020900064 in words is "one billion, twenty million, nine hundred thousand, sixty-four".