20331458448 has 160 divisors (see below), whose sum is σ = 64059899904. Its totient is φ = 5424039936.

The previous prime is 20331458437. The next prime is 20331458461. The reversal of 20331458448 is 84485413302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 711411 + ... + 739437.

Almost surely, 2^20331458448 is an apocalyptic number.

20331458448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20331458448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32029949952).

20331458448 is an abundant number, since it is smaller than the sum of its proper divisors (43728441456).

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

20331458448 is a wasteful number, since it uses less digits than its factorization.

20331458448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28189 (or 28183 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 20331458448 in words is "twenty billion, three hundred thirty-one million, four hundred fifty-eight thousand, four hundred forty-eight".