204150210621 has 48 divisors (see below), whose sum is σ = 317603208384. Its totient is φ = 116303448576.

The previous prime is 204150210611. The next prime is 204150210643. The reversal of 204150210621 is 126012051402.

It is not a de Polignac number, because 204150210621 - 2¹⁰ = 204150209597 is a prime.

It is a super-2 number, since 2×204150210621² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204150210591 and 204150210600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204150210611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103470991 + ... + 103472963.

It is an arithmetic number, because the mean of its divisors is an integer number (6616733508).

Almost surely, 2^204150210621 is an apocalyptic number.

204150210621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

204150210621 is a deficient number, since it is larger than the sum of its proper divisors (113452997763).

204150210621 is a wasteful number, since it uses less digits than its factorization.

204150210621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770 (or 3763 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 204150210621 in words is "two hundred four billion, one hundred fifty million, two hundred ten thousand, six hundred twenty-one".