20801269621 has 8 divisors (see below), whose sum is σ = 23678915904. Its totient is φ = 18088060320.

The previous prime is 20801269571. The next prime is 20801269631. The reversal of 20801269621 is 12696210802.

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

It is not a de Polignac number, because 20801269621 - 2¹⁷ = 20801138549 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 (20801269631) 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, 41108976 + ... + 41109481.

It is an arithmetic number, because the mean of its divisors is an integer number (2959864488).

Almost surely, 2^20801269621 is an apocalyptic number.

It is an amenable number.

20801269621 is a deficient number, since it is larger than the sum of its proper divisors (2877646283).

20801269621 is a wasteful number, since it uses less digits than its factorization.

20801269621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82218491.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 20801269621 in words is "twenty billion, eight hundred one million, two hundred sixty-nine thousand, six hundred twenty-one".