20401231424412 has 48 divisors (see below), whose sum is σ = 48067329390080. Its totient is φ = 6734065906368.

The previous prime is 20401231424377. The next prime is 20401231424419. The reversal of 20401231424412 is 21442413210402.

It is a self number, because there is not a number n which added to its sum of digits gives 20401231424412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401231424419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26264118 + ... + 27029730.

Almost surely, 2^{20401231424412} is an apocalyptic number.

It is an amenable number.

20401231424412 is an abundant number, since it is smaller than the sum of its proper divisors (27666097965668).

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

20401231424412 is a wasteful number, since it uses less digits than its factorization.

20401231424412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787282 (or 787280 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 20401231424412 its reverse (21442413210402), we get a palindrome (41843644634814).

The spelling of 20401231424412 in words is "twenty trillion, four hundred one billion, two hundred thirty-one million, four hundred twenty-four thousand, four hundred twelve".