20663156445 has 8 divisors (see below), whose sum is σ = 33061050336. Its totient is φ = 11020350096.

The previous prime is 20663156429. The next prime is 20663156477. The reversal of 20663156445 is 54465136602.

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

It is not a de Polignac number, because 20663156445 - 2⁴ = 20663156429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20663156397 and 20663156406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688771867 + ... + 688771896.

It is an arithmetic number, because the mean of its divisors is an integer number (4132631292).

Almost surely, 2^20663156445 is an apocalyptic number.

It is an amenable number.

20663156445 is a deficient number, since it is larger than the sum of its proper divisors (12397893891).

20663156445 is a wasteful number, since it uses less digits than its factorization.

20663156445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377543771.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 20663156445 in words is "twenty billion, six hundred sixty-three million, one hundred fifty-six thousand, four hundred forty-five".