20401043244 has 24 divisors (see below), whose sum is σ = 47665008048. Its totient is φ = 6791408640.

The previous prime is 20401043233. The next prime is 20401043249. The reversal of 20401043244 is 44234010402.

It is a happy number.

It is a super-3 number, since 3×20401043244³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20401043249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107877 + ... + 1126140.

It is an arithmetic number, because the mean of its divisors is an integer number (1986042002).

Almost surely, 2^20401043244 is an apocalyptic number.

It is an amenable number.

20401043244 is an abundant number, since it is smaller than the sum of its proper divisors (27263964804).

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

20401043244 is a wasteful number, since it uses less digits than its factorization.

20401043244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234785 (or 2234783 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20401043244 its reverse (44234010402), we get a palindrome (64635053646).

The spelling of 20401043244 in words is "twenty billion, four hundred one million, forty-three thousand, two hundred forty-four".