20291021083 has 2 divisors, whose sum is σ = 20291021084. Its totient is φ = 20291021082.

The previous prime is 20291021053. The next prime is 20291021117. The reversal of 20291021083 is 38012019202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20291021083 - 2¹³ = 20291012891 is a prime.

It is not a weakly prime, because it can be changed into another prime (20291021033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10145510541 + 10145510542.

It is an arithmetic number, because the mean of its divisors is an integer number (10145510542).

Almost surely, 2^20291021083 is an apocalyptic number.

20291021083 is a deficient number, since it is larger than the sum of its proper divisors (1).

20291021083 is an equidigital number, since it uses as much as digits as its factorization.

20291021083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 20291021083 in words is "twenty billion, two hundred ninety-one million, twenty-one thousand, eighty-three".