20420410203997 has 16 divisors (see below), whose sum is σ = 20912141682432. Its totient is φ = 19931135656960.

The previous prime is 20420410203989. The next prime is 20420410204001. The reversal of 20420410203997 is 79930201402402.

It is a cyclic number.

It is not a de Polignac number, because 20420410203997 - 2³ = 20420410203989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420410203967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26006997 + ... + 26780677.

It is an arithmetic number, because the mean of its divisors is an integer number (1307008855152).

Almost surely, 2^{20420410203997} is an apocalyptic number.

It is an amenable number.

20420410203997 is a deficient number, since it is larger than the sum of its proper divisors (491731478435).

20420410203997 is an equidigital number, since it uses as much as digits as its factorization.

20420410203997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775268.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 20420410203997 in words is "twenty trillion, four hundred twenty billion, four hundred ten million, two hundred three thousand, nine hundred ninety-seven".