20447142760 has 64 divisors (see below), whose sum is σ = 51544926720. Its totient is φ = 7234364160.

The previous prime is 20447142743. The next prime is 20447142769. The reversal of 20447142760 is 6724174402.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (20447142769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611704 + ... + 644263.

It is an arithmetic number, because the mean of its divisors is an integer number (805389480).

Almost surely, 2^20447142760 is an apocalyptic number.

20447142760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20447142760 is an abundant number, since it is smaller than the sum of its proper divisors (31097783960).

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

20447142760 is a wasteful number, since it uses less digits than its factorization.

20447142760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256026 (or 1256022 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 37.

The spelling of 20447142760 in words is "twenty billion, four hundred forty-seven million, one hundred forty-two thousand, seven hundred sixty".