20206644442 has 16 divisors (see below), whose sum is σ = 30666722112. Its totient is φ = 9984804480.

The previous prime is 20206644433. The next prime is 20206644443. The reversal of 20206644442 is 24444660202.

It is a junction number, because it is equal to n+sod(n) for n = 20206644398 and 20206644407.

It is not an unprimeable number, because it can be changed into a prime (20206644443) 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, 1258 + ... + 201034.

It is an arithmetic number, because the mean of its divisors is an integer number (1916670132).

Almost surely, 2^20206644442 is an apocalyptic number.

20206644442 is a deficient number, since it is larger than the sum of its proper divisors (10460077670).

20206644442 is a wasteful number, since it uses less digits than its factorization.

20206644442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200373.

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 20206644442 in words is "twenty billion, two hundred six million, six hundred forty-four thousand, four hundred forty-two".