21103601541 has 16 divisors (see below), whose sum is σ = 31199366208. Its totient is φ = 12580387200.

The previous prime is 21103601537. The next prime is 21103601567. The reversal of 21103601541 is 14510630112.

It is a happy number.

It is not a de Polignac number, because 21103601541 - 2² = 21103601537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103601581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5239816 + ... + 5243841.

It is an arithmetic number, because the mean of its divisors is an integer number (1949960388).

Almost surely, 2^21103601541 is an apocalyptic number.

It is an amenable number.

21103601541 is a deficient number, since it is larger than the sum of its proper divisors (10095764667).

21103601541 is a wasteful number, since it uses less digits than its factorization.

21103601541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10483732.

The product of its (nonzero) digits is 720, while the sum is 24.

The spelling of 21103601541 in words is "twenty-one billion, one hundred three million, six hundred one thousand, five hundred forty-one".