81933000124 has 24 divisors (see below), whose sum is σ = 148021106688. Its totient is φ = 39641489520.

The previous prime is 81933000067. The next prime is 81933000251. The reversal of 81933000124 is 42100033918.

81933000124 = T₂₃₃₇₁₂ + T₂₃₃₇₁₃ + T₂₃₃₇₁₄.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1873977 + ... + 1917199.

It is an arithmetic number, because the mean of its divisors is an integer number (6167546112).

Almost surely, 2^81933000124 is an apocalyptic number.

81933000124 is the 233714-th centered triangular number.

It is an amenable number.

81933000124 is a deficient number, since it is larger than the sum of its proper divisors (66088106564).

81933000124 is a wasteful number, since it uses less digits than its factorization.

81933000124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58545 (or 58543 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 81933000124 in words is "eighty-one billion, nine hundred thirty-three million, one hundred twenty-four", and thus it is an aban number.