20402213340 has 48 divisors (see below), whose sum is σ = 57140979840. Its totient is φ = 5439182400.

The previous prime is 20402213329. The next prime is 20402213353. The reversal of 20402213340 is 4331220402.

It is a congruent number.

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, 201091 + ... + 285029.

It is an arithmetic number, because the mean of its divisors is an integer number (1190437080).

Almost surely, 2^20402213340 is an apocalyptic number.

20402213340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402213340 is an abundant number, since it is smaller than the sum of its proper divisors (36738766500).

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

20402213340 is a wasteful number, since it uses less digits than its factorization.

20402213340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88002 (or 88000 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20402213340 its reverse (4331220402), we get a palindrome (24733433742).

The spelling of 20402213340 in words is "twenty billion, four hundred two million, two hundred thirteen thousand, three hundred forty".