20123401236 has 24 divisors (see below), whose sum is σ = 46959964800. Its totient is φ = 6707034432.

The previous prime is 20123401219. The next prime is 20123401253. The reversal of 20123401236 is 63210432102.

It is an interprime number because it is at equal distance from previous prime (20123401219) and next prime (20123401253).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19240 + ... + 201536.

It is an arithmetic number, because the mean of its divisors is an integer number (1956665200).

Almost surely, 2^20123401236 is an apocalyptic number.

It is an amenable number.

20123401236 is an abundant number, since it is smaller than the sum of its proper divisors (26836563564).

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

20123401236 is a wasteful number, since it uses less digits than its factorization.

20123401236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191503 (or 191501 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20123401236 its reverse (63210432102), we get a palindrome (83333833338).

The spelling of 20123401236 in words is "twenty billion, one hundred twenty-three million, four hundred one thousand, two hundred thirty-six".