20474210819 has 2 divisors, whose sum is σ = 20474210820. Its totient is φ = 20474210818.

The previous prime is 20474210807. The next prime is 20474210903. The reversal of 20474210819 is 91801247402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20474210819 - 2⁸ = 20474210563 is a prime.

It is a super-2 number, since 2×20474210819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20474215819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10237105409 + 10237105410.

It is an arithmetic number, because the mean of its divisors is an integer number (10237105410).

Almost surely, 2^20474210819 is an apocalyptic number.

20474210819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20474210819 is an equidigital number, since it uses as much as digits as its factorization.

20474210819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 20474210819 in words is "twenty billion, four hundred seventy-four million, two hundred ten thousand, eight hundred nineteen".