20236242540 has 24 divisors (see below), whose sum is σ = 56661479280. Its totient is φ = 5396331328.

The previous prime is 20236242511. The next prime is 20236242563. The reversal of 20236242540 is 4524263202.

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 = 20236242498 and 20236242507.

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 7 ways as a sum of consecutive naturals, for example, 168635295 + ... + 168635414.

It is an arithmetic number, because the mean of its divisors is an integer number (2360894970).

Almost surely, 2^20236242540 is an apocalyptic number.

20236242540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20236242540 is an abundant number, since it is smaller than the sum of its proper divisors (36425236740).

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

20236242540 is a wasteful number, since it uses less digits than its factorization.

20236242540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337270721 (or 337270719 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The spelling of 20236242540 in words is "twenty billion, two hundred thirty-six million, two hundred forty-two thousand, five hundred forty".