20216845437 has 8 divisors (see below), whose sum is σ = 26966730336. Its totient is φ = 13472428752.

The previous prime is 20216845379. The next prime is 20216845447. The reversal of 20216845437 is 73454861202.

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

It is not a de Polignac number, because 20216845437 - 2⁷ = 20216845309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216845447) 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, 1358418 + ... + 1373219.

It is an arithmetic number, because the mean of its divisors is an integer number (3370841292).

Almost surely, 2^20216845437 is an apocalyptic number.

It is an amenable number.

20216845437 is a deficient number, since it is larger than the sum of its proper divisors (6749884899).

20216845437 is a wasteful number, since it uses less digits than its factorization.

20216845437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734107.

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 20216845437 in words is "twenty billion, two hundred sixteen million, eight hundred forty-five thousand, four hundred thirty-seven".