20236432340 has 24 divisors (see below), whose sum is σ = 43867364352. Its totient is φ = 7833457440.

The previous prime is 20236432331. The next prime is 20236432357. The reversal of 20236432340 is 4323463202.

It is a super-3 number, since 3×20236432340³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16319084 + ... + 16320323.

It is an arithmetic number, because the mean of its divisors is an integer number (1827806848).

Almost surely, 2^20236432340 is an apocalyptic number.

20236432340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20236432340 is an abundant number, since it is smaller than the sum of its proper divisors (23630932012).

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

20236432340 is a wasteful number, since it uses less digits than its factorization.

20236432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32639447 (or 32639445 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 20236432340 its reverse (4323463202), we get a palindrome (24559895542).

The spelling of 20236432340 in words is "twenty billion, two hundred thirty-six million, four hundred thirty-two thousand, three hundred forty".