20413211440 has 20 divisors (see below), whose sum is σ = 47460716784. Its totient is φ = 8165284544.

The previous prime is 20413211437. The next prime is 20413211453. The reversal of 20413211440 is 4411231402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127582492 + ... + 127582651.

Almost surely, 2^20413211440 is an apocalyptic number.

20413211440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20413211440 is an abundant number, since it is smaller than the sum of its proper divisors (27047505344).

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

20413211440 is a wasteful number, since it uses less digits than its factorization.

20413211440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255165156 (or 255165150 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20413211440 its reverse (4411231402), we get a palindrome (24824442842).

The spelling of 20413211440 in words is "twenty billion, four hundred thirteen million, two hundred eleven thousand, four hundred forty".