20150354021 has 16 divisors (see below), whose sum is σ = 23242495104. Its totient is φ = 17111721984.

The previous prime is 20150354011. The next prime is 20150354033. The reversal of 20150354021 is 12045305102.

It is not a de Polignac number, because 20150354021 - 2¹⁸ = 20150091877 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 (20150354011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2857526 + ... + 2864568.

It is an arithmetic number, because the mean of its divisors is an integer number (1452655944).

Almost surely, 2^20150354021 is an apocalyptic number.

It is an amenable number.

20150354021 is a deficient number, since it is larger than the sum of its proper divisors (3092141083).

20150354021 is a wasteful number, since it uses less digits than its factorization.

20150354021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10780.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20150354021 its reverse (12045305102), we get a palindrome (32195659123).

The spelling of 20150354021 in words is "twenty billion, one hundred fifty million, three hundred fifty-four thousand, twenty-one".