10020402109 has 2 divisors, whose sum is σ = 10020402110. Its totient is φ = 10020402108.

The previous prime is 10020402097. The next prime is 10020402113. The reversal of 10020402109 is 90120402001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9001834884 + 1018567225 = 94878^2 + 31915^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020402109 - 2¹³ = 10020393917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10020402199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010201054 + 5010201055.

It is an arithmetic number, because the mean of its divisors is an integer number (5010201055).

Almost surely, 2^10020402109 is an apocalyptic number.

It is an amenable number.

10020402109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020402109 is an equidigital number, since it uses as much as digits as its factorization.

10020402109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 10020402109 in words is "ten billion, twenty million, four hundred two thousand, one hundred nine".