21541402513 has 8 divisors (see below), whose sum is σ = 22899669120. Its totient is φ = 20205586800.

The previous prime is 21541402469. The next prime is 21541402529. The reversal of 21541402513 is 31520414512.

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 21541402513 - 2¹⁷ = 21541271441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21541402573) 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, 5610745 + ... + 5614582.

It is an arithmetic number, because the mean of its divisors is an integer number (2862458640).

Almost surely, 2^21541402513 is an apocalyptic number.

It is an amenable number.

21541402513 is a deficient number, since it is larger than the sum of its proper divisors (1358266607).

21541402513 is a wasteful number, since it uses less digits than its factorization.

21541402513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11225447.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 21541402513 in words is "twenty-one billion, five hundred forty-one million, four hundred two thousand, five hundred thirteen".