10521500454 has 64 divisors (see below), whose sum is σ = 23822760960. Its totient is φ = 3441204000.

The previous prime is 10521500383. The next prime is 10521500459. The reversal of 10521500454 is 45400512501.

10521500454 is a `hidden beast` number, since 10 + 52 + 150 + 0 + 454 = 666.

It is a super-2 number, since 2×10521500454² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521500459) 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, 1416009 + ... + 1423419.

It is an arithmetic number, because the mean of its divisors is an integer number (372230640).

Almost surely, 2^10521500454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10521500454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11911380480).

10521500454 is an abundant number, since it is smaller than the sum of its proper divisors (13301260506).

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

10521500454 is a wasteful number, since it uses less digits than its factorization.

10521500454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7914 (or 7908 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 10521500454 in words is "ten billion, five hundred twenty-one million, five hundred thousand, four hundred fifty-four".