20205251402 has 32 divisors (see below), whose sum is σ = 35410632192. Its totient is φ = 8466505344.

The previous prime is 20205251401. The next prime is 20205251441. The reversal of 20205251402 is 20415250202.

It is not an unprimeable number, because it can be changed into a prime (20205251401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651398 + ... + 681710.

It is an arithmetic number, because the mean of its divisors is an integer number (1106582256).

Almost surely, 2^20205251402 is an apocalyptic number.

20205251402 is a deficient number, since it is larger than the sum of its proper divisors (15205380790).

20205251402 is a wasteful number, since it uses less digits than its factorization.

20205251402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31382.

The product of its (nonzero) digits is 1600, while the sum is 23.

The spelling of 20205251402 in words is "twenty billion, two hundred five million, two hundred fifty-one thousand, four hundred two".