20401011140 has 12 divisors (see below), whose sum is σ = 42842123436. Its totient is φ = 8160404448.

The previous prime is 20401011139. The next prime is 20401011157. The reversal of 20401011140 is 4111010402.

It can be written as a sum of positive squares in 2 ways, for example, as 9059613124 + 11341398016 = 95182^2 + 106496^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510025259 + ... + 510025298.

It is an arithmetic number, because the mean of its divisors is an integer number (3570176953).

Almost surely, 2^20401011140 is an apocalyptic number.

20401011140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20401011140 is an abundant number, since it is smaller than the sum of its proper divisors (22441112296).

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

20401011140 is a wasteful number, since it uses less digits than its factorization.

20401011140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020050566 (or 1020050564 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20401011140 its reverse (4111010402), we get a palindrome (24512021542).

The spelling of 20401011140 in words is "twenty billion, four hundred one million, eleven thousand, one hundred forty".