21013145096 has 8 divisors (see below), whose sum is σ = 39399647070. Its totient is φ = 10506572544.

The previous prime is 21013145081. The next prime is 21013145149. The reversal of 21013145096 is 69054131012.

It can be written as a sum of positive squares in only one way, i.e., 11090196100 + 9922948996 = 105310^2 + 99614^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313321561 + ... + 1313321576.

Almost surely, 2^21013145096 is an apocalyptic number.

It is an amenable number.

21013145096 is a deficient number, since it is larger than the sum of its proper divisors (18386501974).

21013145096 is a wasteful number, since it uses less digits than its factorization.

21013145096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626643143 (or 2626643139 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 21013145096 in words is "twenty-one billion, thirteen million, one hundred forty-five thousand, ninety-six".