20431894798 has 16 divisors (see below), whose sum is σ = 35072393184. Its totient is φ = 8744954400.

The previous prime is 20431894753. The next prime is 20431894799. The reversal of 20431894798 is 89749813402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431894799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953353 + ... + 974548.

It is an arithmetic number, because the mean of its divisors is an integer number (2192024574).

Almost surely, 2^20431894798 is an apocalyptic number.

20431894798 is a deficient number, since it is larger than the sum of its proper divisors (14640498386).

20431894798 is a wasteful number, since it uses less digits than its factorization.

20431894798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928667.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 20431894798 in words is "twenty billion, four hundred thirty-one million, eight hundred ninety-four thousand, seven hundred ninety-eight".