21011054000 has 40 divisors (see below), whose sum is σ = 50804733408. Its totient is φ = 8404420800.

The previous prime is 21011053991. The next prime is 21011054017. The reversal of 21011054000 is 45011012.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5250764 + ... + 5254763.

Almost surely, 2^21011054000 is an apocalyptic number.

21011054000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011054000 is an abundant number, since it is smaller than the sum of its proper divisors (29793679408).

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

21011054000 is a wasteful number, since it uses less digits than its factorization.

21011054000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505550 (or 10505534 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 21011054000 its reverse (45011012), we get a palindrome (21056065012).

The spelling of 21011054000 in words is "twenty-one billion, eleven million, fifty-four thousand".