20020219931 has 2 divisors, whose sum is σ = 20020219932. Its totient is φ = 20020219930.

The previous prime is 20020219903. The next prime is 20020220023. The reversal of 20020219931 is 13991202002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020219931 is a prime.

It is a super-2 number, since 2×20020219931² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20020219894 and 20020219903.

It is not a weakly prime, because it can be changed into another prime (20020212931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010109965 + 10010109966.

It is an arithmetic number, because the mean of its divisors is an integer number (10010109966).

Almost surely, 2^20020219931 is an apocalyptic number.

20020219931 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020219931 is an equidigital number, since it uses as much as digits as its factorization.

20020219931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 20020219931 in words is "twenty billion, twenty million, two hundred nineteen thousand, nine hundred thirty-one".