40503535021 has 2 divisors, whose sum is σ = 40503535022. Its totient is φ = 40503535020.

The previous prime is 40503534989. The next prime is 40503535081. The reversal of 40503535021 is 12053530504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34073098921 + 6430436100 = 184589^2 + 80190^2 .

It is a cyclic number.

It is not a de Polignac number, because 40503535021 - 2⁵ = 40503534989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40503535081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20251767510 + 20251767511.

It is an arithmetic number, because the mean of its divisors is an integer number (20251767511).

Almost surely, 2^40503535021 is an apocalyptic number.

It is an amenable number.

40503535021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40503535021 is an equidigital number, since it uses as much as digits as its factorization.

40503535021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 40503535021 in words is "forty billion, five hundred three million, five hundred thirty-five thousand, twenty-one".