21411432015 has 32 divisors (see below), whose sum is σ = 35180697600. Its totient is φ = 11116035840.

The previous prime is 21411431963. The next prime is 21411432023. The reversal of 21411432015 is 51023411412.

It is not a de Polignac number, because 21411432015 - 2⁷ = 21411431887 is a prime.

It is a congruent number.

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, 43110 + ... + 211379.

It is an arithmetic number, because the mean of its divisors is an integer number (1099396800).

Almost surely, 2^21411432015 is an apocalyptic number.

21411432015 is a deficient number, since it is larger than the sum of its proper divisors (13769265585).

21411432015 is a wasteful number, since it uses less digits than its factorization.

21411432015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254647.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21411432015 its reverse (51023411412), we get a palindrome (72434843427).

The spelling of 21411432015 in words is "twenty-one billion, four hundred eleven million, four hundred thirty-two thousand, fifteen".