43020993921623 has 2 divisors, whose sum is σ = 43020993921624. Its totient is φ = 43020993921622.

The previous prime is 43020993921527. The next prime is 43020993921629. The reversal of 43020993921623 is 32612939902034.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43020993921623 - 2²² = 43020989727319 is a prime.

It is a super-2 number, since 2×43020993921623² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43020993921629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21510496960811 + 21510496960812.

It is an arithmetic number, because the mean of its divisors is an integer number (21510496960812).

Almost surely, 2^{43020993921623} is an apocalyptic number.

43020993921623 is a deficient number, since it is larger than the sum of its proper divisors (1).

43020993921623 is an equidigital number, since it uses as much as digits as its factorization.

43020993921623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 53.

The spelling of 43020993921623 in words is "forty-three trillion, twenty billion, nine hundred ninety-three million, nine hundred twenty-one thousand, six hundred twenty-three".