21242126463 has 16 divisors (see below), whose sum is σ = 29007834240. Its totient is φ = 13819516704.

The previous prime is 21242126461. The next prime is 21242126471. The reversal of 21242126463 is 36462124212.

It is not a de Polignac number, because 21242126463 - 2¹ = 21242126461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242126461) 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, 68820 + ... + 217302.

It is an arithmetic number, because the mean of its divisors is an integer number (1812989640).

Almost surely, 2^21242126463 is an apocalyptic number.

21242126463 is a deficient number, since it is larger than the sum of its proper divisors (7765707777).

21242126463 is a wasteful number, since it uses less digits than its factorization.

21242126463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149638.

The product of its digits is 27648, while the sum is 33.

The spelling of 21242126463 in words is "twenty-one billion, two hundred forty-two million, one hundred twenty-six thousand, four hundred sixty-three".