20346842644 has 6 divisors (see below), whose sum is σ = 35606974634. Its totient is φ = 10173421320.

The previous prime is 20346842603. The next prime is 20346842701. The reversal of 20346842644 is 44624864302.

It can be written as a sum of positive squares in only one way, i.e., 12025754244 + 8321088400 = 109662^2 + 91220^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20346842644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2543355327 + ... + 2543355334.

Almost surely, 2^20346842644 is an apocalyptic number.

It is an amenable number.

20346842644 is a deficient number, since it is larger than the sum of its proper divisors (15260131990).

20346842644 is a wasteful number, since it uses less digits than its factorization.

20346842644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086710665 (or 5086710663 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 43.

The spelling of 20346842644 in words is "twenty billion, three hundred forty-six million, eight hundred forty-two thousand, six hundred forty-four".