20219696594 has 4 divisors (see below), whose sum is σ = 30329544894. Its totient is φ = 10109848296.

The previous prime is 20219696591. The next prime is 20219696671. The reversal of 20219696594 is 49569691202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19870567369 + 349129225 = 140963^2 + 18685^2 .

It is a super-2 number, since 2×20219696594² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20219696591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5054924147 + ... + 5054924150.

Almost surely, 2^20219696594 is an apocalyptic number.

20219696594 is a deficient number, since it is larger than the sum of its proper divisors (10109848300).

20219696594 is a wasteful number, since it uses less digits than its factorization.

20219696594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10109848299.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 20219696594 in words is "twenty billion, two hundred nineteen million, six hundred ninety-six thousand, five hundred ninety-four".