31402019220 has 288 divisors, whose sum is σ = 104510574336. Its totient is φ = 6997985280.

The previous prime is 31402019213. The next prime is 31402019249. The reversal of 31402019220 is 2291020413.

It is a super-2 number, since 2×31402019220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29540409 + ... + 29541471.

Almost surely, 2^31402019220 is an apocalyptic number.

31402019220 is a gapful number since it is divisible by the number (30) 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 31402019220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52255287168).

31402019220 is an abundant number, since it is smaller than the sum of its proper divisors (73108555116).

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

31402019220 is a wasteful number, since it uses less digits than its factorization.

31402019220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31402019220 its reverse (2291020413), we get a palindrome (33693039633).

The spelling of 31402019220 in words is "thirty-one billion, four hundred two million, nineteen thousand, two hundred twenty".