21024052545 has 32 divisors (see below), whose sum is σ = 34003517184. Its totient is φ = 11091398400.

The previous prime is 21024052523. The next prime is 21024052547. The reversal of 21024052545 is 54525042012.

It is not a de Polignac number, because 21024052545 - 2⁸ = 21024052289 is a prime.

It is a super-3 number, since 3×21024052545³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21024052547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1446615 + ... + 1461075.

It is an arithmetic number, because the mean of its divisors is an integer number (1062609912).

Almost surely, 2^21024052545 is an apocalyptic number.

It is an amenable number.

21024052545 is a deficient number, since it is larger than the sum of its proper divisors (12979464639).

21024052545 is a wasteful number, since it uses less digits than its factorization.

21024052545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15513.

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 21024052545 its reverse (54525042012), we get a palindrome (75549094557).

The spelling of 21024052545 in words is "twenty-one billion, twenty-four million, fifty-two thousand, five hundred forty-five".