20351442621644 has 24 divisors (see below), whose sum is σ = 36106542156048. Its totient is φ = 10035315832320.

The previous prime is 20351442621641. The next prime is 20351442621647. The reversal of 20351442621644 is 44612624415302.

It is an interprime number because it is at equal distance from previous prime (20351442621641) and next prime (20351442621647).

It is a junction number, because it is equal to n+sod(n) for n = 20351442621595 and 20351442621604.

It is not an unprimeable number, because it can be changed into a prime (20351442621641) 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, 609197 + ... + 6408900.

It is an arithmetic number, because the mean of its divisors is an integer number (1504439256502).

Almost surely, 2^{20351442621644} is an apocalyptic number.

It is an amenable number.

20351442621644 is a deficient number, since it is larger than the sum of its proper divisors (15755099534404).

20351442621644 is a wasteful number, since it uses less digits than its factorization.

20351442621644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028105 (or 7028103 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 20351442621644 in words is "twenty trillion, three hundred fifty-one billion, four hundred forty-two million, six hundred twenty-one thousand, six hundred forty-four".