21243076957498 has 32 divisors (see below), whose sum is σ = 35375315976000. Its totient is φ = 9485640568320.

The previous prime is 21243076957493. The next prime is 21243076957507. The reversal of 21243076957498 is 89475967034212.

It is not an unprimeable number, because it can be changed into a prime (21243076957493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3871543 + ... + 7581226.

It is an arithmetic number, because the mean of its divisors is an integer number (1105478624250).

It is a 1-persistent number, because it is pandigital, but 2⋅21243076957498 = 42486153914996 is not.

Almost surely, 2^{21243076957498} is an apocalyptic number.

21243076957498 is a deficient number, since it is larger than the sum of its proper divisors (14132239018502).

21243076957498 is a wasteful number, since it uses less digits than its factorization.

21243076957498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11454270.

The product of its (nonzero) digits is 182891520, while the sum is 67.

The spelling of 21243076957498 in words is "twenty-one trillion, two hundred forty-three billion, seventy-six million, nine hundred fifty-seven thousand, four hundred ninety-eight".