20251535205 has 64 divisors (see below), whose sum is σ = 36311058432. Its totient is φ = 9553232640.

The previous prime is 20251535201. The next prime is 20251535221. The reversal of 20251535205 is 50253515202.

It is not a de Polignac number, because 20251535205 - 2² = 20251535201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20251535201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1860559 + ... + 1871411.

It is an arithmetic number, because the mean of its divisors is an integer number (567360288).

Almost surely, 2^20251535205 is an apocalyptic number.

It is an amenable number.

20251535205 is a deficient number, since it is larger than the sum of its proper divisors (16059523227).

20251535205 is a wasteful number, since it uses less digits than its factorization.

20251535205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11178.

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 20251535205 in words is "twenty billion, two hundred fifty-one million, five hundred thirty-five thousand, two hundred five".