10520436421 has 8 divisors (see below), whose sum is σ = 11517397344. Its totient is φ = 9530235120.

The previous prime is 10520436397. The next prime is 10520436449. The reversal of 10520436421 is 12463402501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10520436421 - 2⁵ = 10520436389 is a prime.

It is a super-2 number, since 2×10520436421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10520436421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10520436481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1686646 + ... + 1692871.

It is an arithmetic number, because the mean of its divisors is an integer number (1439674668).

Almost surely, 2^10520436421 is an apocalyptic number.

10520436421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10520436421 is a deficient number, since it is larger than the sum of its proper divisors (996960923).

10520436421 is a wasteful number, since it uses less digits than its factorization.

10520436421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379811.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 10520436421 its reverse (12463402501), we get a palindrome (22983838922).

The spelling of 10520436421 in words is "ten billion, five hundred twenty million, four hundred thirty-six thousand, four hundred twenty-one".