21000527562 has 64 divisors (see below), whose sum is σ = 49629945600. Its totient is φ = 5798739456.

The previous prime is 21000527531. The next prime is 21000527579. The reversal of 21000527562 is 26572500012.

It is a super-4 number, since 4×21000527562⁴ (a number of 42 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186198 + ... + 276894.

It is an arithmetic number, because the mean of its divisors is an integer number (775467900).

Almost surely, 2^21000527562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21000527562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24814972800).

21000527562 is an abundant number, since it is smaller than the sum of its proper divisors (28629418038).

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

21000527562 is a wasteful number, since it uses less digits than its factorization.

21000527562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90895.

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 21000527562 in words is "twenty-one billion, five hundred twenty-seven thousand, five hundred sixty-two".