20663732354 has 4 divisors (see below), whose sum is σ = 30995598534. Its totient is φ = 10331866176.

The previous prime is 20663732347. The next prime is 20663732387. The reversal of 20663732354 is 45323736602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16009081729 + 4654650625 = 126527^2 + 68225^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5165933087 + ... + 5165933090.

Almost surely, 2^20663732354 is an apocalyptic number.

20663732354 is a deficient number, since it is larger than the sum of its proper divisors (10331866180).

20663732354 is a wasteful number, since it uses less digits than its factorization.

20663732354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331866179.

The product of its (nonzero) digits is 544320, while the sum is 41.

The spelling of 20663732354 in words is "twenty billion, six hundred sixty-three million, seven hundred thirty-two thousand, three hundred fifty-four".