131320203420 has 192 divisors, whose sum is σ = 427604631552. Its totient is φ = 29490048000.

The previous prime is 131320203409. The next prime is 131320203463. The reversal of 131320203420 is 24302023131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27180405 + ... + 27185235.

It is an arithmetic number, because the mean of its divisors is an integer number (2227107456).

Almost surely, 2^131320203420 is an apocalyptic number.

131320203420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131320203420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213802315776).

131320203420 is an abundant number, since it is smaller than the sum of its proper divisors (296284428132).

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

131320203420 is a wasteful number, since it uses less digits than its factorization.

131320203420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972 (or 5970 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 131320203420 its reverse (24302023131), we get a palindrome (155622226551).

The spelling of 131320203420 in words is "one hundred thirty-one billion, three hundred twenty million, two hundred three thousand, four hundred twenty".