20627547421 has 8 divisors (see below), whose sum is σ = 22220838360. Its totient is φ = 19035193152.

The previous prime is 20627547359. The next prime is 20627547461. The reversal of 20627547421 is 12474572602.

It can be written as a sum of positive squares in 4 ways, for example, as 1075118521 + 19552428900 = 32789^2 + 139830^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20627547421 - 2¹⁷ = 20627416349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20627547461) 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, 188086 + ... + 276823.

It is an arithmetic number, because the mean of its divisors is an integer number (2777604795).

Almost surely, 2^20627547421 is an apocalyptic number.

It is an amenable number.

20627547421 is a deficient number, since it is larger than the sum of its proper divisors (1593290939).

20627547421 is a wasteful number, since it uses less digits than its factorization.

20627547421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468335.

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 20627547421 in words is "twenty billion, six hundred twenty-seven million, five hundred forty-seven thousand, four hundred twenty-one".