20010032421 has 8 divisors (see below), whose sum is σ = 26856732864. Its totient is φ = 13251676800.

The previous prime is 20010032389. The next prime is 20010032423. The reversal of 20010032421 is 12423001002.

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

It is not a de Polignac number, because 20010032421 - 2⁵ = 20010032389 is a prime.

It is a super-2 number, since 2×20010032421² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20010032421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010032423) 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, 22085676 + ... + 22086581.

It is an arithmetic number, because the mean of its divisors is an integer number (3357091608).

Almost surely, 2^20010032421 is an apocalyptic number.

It is an amenable number.

20010032421 is a deficient number, since it is larger than the sum of its proper divisors (6846700443).

20010032421 is a wasteful number, since it uses less digits than its factorization.

20010032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44172411.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20010032421 its reverse (12423001002), we get a palindrome (32433033423).

The spelling of 20010032421 in words is "twenty billion, ten million, thirty-two thousand, four hundred twenty-one".