20445143654 has 8 divisors (see below), whose sum is σ = 33026770560. Its totient is φ = 9436220136.

The previous prime is 20445143639. The next prime is 20445143657. The reversal of 20445143654 is 45634154402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445143657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393175814 + ... + 393175865.

It is an arithmetic number, because the mean of its divisors is an integer number (4128346320).

Almost surely, 2^20445143654 is an apocalyptic number.

20445143654 is a deficient number, since it is larger than the sum of its proper divisors (12581626906).

20445143654 is a wasteful number, since it uses less digits than its factorization.

20445143654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786351694.

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 20445143654 in words is "twenty billion, four hundred forty-five million, one hundred forty-three thousand, six hundred fifty-four".