20280038464 has 63 divisors (see below), whose sum is σ = 46831935927. Its totient is φ = 8688027264.

The previous prime is 20280038461. The next prime is 20280038501. The reversal of 20280038464 is 46483008202.

The square root of 20280038464 is 142408.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×20280038464² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20280038461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7973577 + ... + 7976119.

Almost surely, 2^20280038464 is an apocalyptic number.

20280038464 is the 142408-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20280038464

20280038464 is an abundant number, since it is smaller than the sum of its proper divisors (26551897463).

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

20280038464 is an frugal number, since it uses more digits than its factorization.

20280038464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112 (or 2552 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 20280038464 in words is "twenty billion, two hundred eighty million, thirty-eight thousand, four hundred sixty-four".