20211423240 has 64 divisors (see below), whose sum is σ = 60656564160. Its totient is φ = 5387731200.

The previous prime is 20211423217. The next prime is 20211423251. The reversal of 20211423240 is 4232411202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312582 + ... + 371658.

It is an arithmetic number, because the mean of its divisors is an integer number (947758815).

Almost surely, 2^20211423240 is an apocalyptic number.

20211423240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211423240 is an abundant number, since it is smaller than the sum of its proper divisors (40445140920).

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

20211423240 is a wasteful number, since it uses less digits than its factorization.

20211423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61942 (or 61938 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20211423240 its reverse (4232411202), we get a palindrome (24443834442).

The spelling of 20211423240 in words is "twenty billion, two hundred eleven million, four hundred twenty-three thousand, two hundred forty".