20401123412 has 12 divisors (see below), whose sum is σ = 36191034516. Its totient is φ = 10060827840.

The previous prime is 20401123399. The next prime is 20401123429. The reversal of 20401123412 is 21432110402.

It can be written as a sum of positive squares in 2 ways, for example, as 15933003076 + 4468120336 = 126226^2 + 66844^2 .

It is a congruent number.

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, 34933139 + ... + 34933722.

It is an arithmetic number, because the mean of its divisors is an integer number (3015919543).

Almost surely, 2^20401123412 is an apocalyptic number.

It is an amenable number.

20401123412 is a deficient number, since it is larger than the sum of its proper divisors (15789911104).

20401123412 is a wasteful number, since it uses less digits than its factorization.

20401123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69866938 (or 69866936 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20401123412 its reverse (21432110402), we get a palindrome (41833233814).

The spelling of 20401123412 in words is "twenty billion, four hundred one million, one hundred twenty-three thousand, four hundred twelve".