21096854460 has 192 divisors, whose sum is σ = 74071065600. Its totient is φ = 4937990400.

The previous prime is 21096854437. The next prime is 21096854461. The reversal of 21096854460 is 6445869012.

21096854460 is a `hidden beast` number, since 2 + 10 + 96 + 8 + 544 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21096854461) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111025 + ... + 233495.

It is an arithmetic number, because the mean of its divisors is an integer number (385786800).

Almost surely, 2^21096854460 is an apocalyptic number.

21096854460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21096854460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37035532800).

21096854460 is an abundant number, since it is smaller than the sum of its proper divisors (52974211140).

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

21096854460 is a wasteful number, since it uses less digits than its factorization.

21096854460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122529 (or 122521 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 21096854460 in words is "twenty-one billion, ninety-six million, eight hundred fifty-four thousand, four hundred sixty".