20230021551 has 8 divisors (see below), whose sum is σ = 27353268864. Its totient is φ = 13296727640.

The previous prime is 20230021547. The next prime is 20230021561. The reversal of 20230021551 is 15512003202.

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 20230021551 - 2² = 20230021547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20230021541) 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, 47488101 + ... + 47488526.

It is an arithmetic number, because the mean of its divisors is an integer number (3419158608).

Almost surely, 2^20230021551 is an apocalyptic number.

20230021551 is a deficient number, since it is larger than the sum of its proper divisors (7123247313).

20230021551 is an equidigital number, since it uses as much as digits as its factorization.

20230021551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94976701.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 20230021551 its reverse (15512003202), we get a palindrome (35742024753).

The spelling of 20230021551 in words is "twenty billion, two hundred thirty million, twenty-one thousand, five hundred fifty-one".