20229501540 has 96 divisors (see below), whose sum is σ = 56910672000. Its totient is φ = 5369075712.

The previous prime is 20229501529. The next prime is 20229501563. The reversal of 20229501540 is 4510592202.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20229501498 and 20229501507.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 20048556 + ... + 20049564.

It is an arithmetic number, because the mean of its divisors is an integer number (592819500).

Almost surely, 2^20229501540 is an apocalyptic number.

20229501540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20229501540 is an abundant number, since it is smaller than the sum of its proper divisors (36681170460).

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

20229501540 is a wasteful number, since it uses less digits than its factorization.

20229501540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2267 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 20229501540 in words is "twenty billion, two hundred twenty-nine million, five hundred one thousand, five hundred forty".