31420021430 has 64 divisors (see below), whose sum is σ = 65074544640. Its totient is φ = 10699584000.

The previous prime is 31420021417. The next prime is 31420021531. The reversal of 31420021430 is 3412002413.

It is a super-3 number, since 3×31420021430³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11216030 + ... + 11218830.

It is an arithmetic number, because the mean of its divisors is an integer number (1016789760).

Almost surely, 2^31420021430 is an apocalyptic number.

31420021430 is an abundant number, since it is smaller than the sum of its proper divisors (33654523210).

31420021430 is a wasteful number, since it uses less digits than its factorization.

31420021430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31420021430 its reverse (3412002413), we get a palindrome (34832023843).

The spelling of 31420021430 in words is "thirty-one billion, four hundred twenty million, twenty-one thousand, four hundred thirty".