21424154503031 has 12 divisors (see below), whose sum is σ = 24926795507160. Its totient is φ = 18360009526320.

The previous prime is 21424154503021. The next prime is 21424154503067. The reversal of 21424154503031 is 13030545142412.

It is not a de Polignac number, because 21424154503031 - 2³⁸ = 21149276596087 is a prime.

It is a super-2 number, since 2×21424154503031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21424154502982 and 21424154503000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424154503021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42023516 + ... + 42530273.

It is an arithmetic number, because the mean of its divisors is an integer number (2077232958930).

Almost surely, 2^{21424154503031} is an apocalyptic number.

21424154503031 is a deficient number, since it is larger than the sum of its proper divisors (3502641004129).

21424154503031 is an equidigital number, since it uses as much as digits as its factorization.

21424154503031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84558974 (or 84558967 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21424154503031 its reverse (13030545142412), we get a palindrome (34454699645443).

The spelling of 21424154503031 in words is "twenty-one trillion, four hundred twenty-four billion, one hundred fifty-four million, five hundred three thousand, thirty-one".