21541402534 has 8 divisors (see below), whose sum is σ = 32356188000. Its totient is φ = 10756006536.

The previous prime is 21541402529. The next prime is 21541402573. The reversal of 21541402534 is 43520414512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21541402496 and 21541402505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7345534 + ... + 7348465.

It is an arithmetic number, because the mean of its divisors is an integer number (4044523500).

Almost surely, 2^21541402534 is an apocalyptic number.

21541402534 is a deficient number, since it is larger than the sum of its proper divisors (10814785466).

21541402534 is a wasteful number, since it uses less digits than its factorization.

21541402534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14694734.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 21541402534 in words is "twenty-one billion, five hundred forty-one million, four hundred two thousand, five hundred thirty-four".