10420321515 has 32 divisors (see below), whose sum is σ = 16893757440. Its totient is φ = 5484094464.

The previous prime is 10420321481. The next prime is 10420321519. The reversal of 10420321515 is 51512302401.

It is a happy number.

It is not a de Polignac number, because 10420321515 - 2¹⁸ = 10420059371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10420321519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494566 + ... + 515204.

It is an arithmetic number, because the mean of its divisors is an integer number (527929920).

Almost surely, 2^10420321515 is an apocalyptic number.

10420321515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10420321515 is a deficient number, since it is larger than the sum of its proper divisors (6473435925).

10420321515 is a wasteful number, since it uses less digits than its factorization.

10420321515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21091.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 10420321515 its reverse (51512302401), we get a palindrome (61932623916).

The spelling of 10420321515 in words is "ten billion, four hundred twenty million, three hundred twenty-one thousand, five hundred fifteen".