20403422140 has 24 divisors (see below), whose sum is σ = 42870068640. Its totient is φ = 8157010368.

The previous prime is 20403422119. The next prime is 20403422167. The reversal of 20403422140 is 4122430402.

It is a happy number.

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, 233887 + ... + 309046.

It is an arithmetic number, because the mean of its divisors is an integer number (1786252860).

Almost surely, 2^20403422140 is an apocalyptic number.

20403422140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20403422140 is an abundant number, since it is smaller than the sum of its proper divisors (22466646500).

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

20403422140 is a wasteful number, since it uses less digits than its factorization.

20403422140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544821 (or 544819 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20403422140 its reverse (4122430402), we get a palindrome (24525852542).

The spelling of 20403422140 in words is "twenty billion, four hundred three million, four hundred twenty-two thousand, one hundred forty".