2051020405 has 32 divisors (see below), whose sum is σ = 2850681600. Its totient is φ = 1387599360.

The previous prime is 2051020393. The next prime is 2051020463. The reversal of 2051020405 is 5040201502.

It is not a de Polignac number, because 2051020405 - 2¹⁵ = 2050987637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1051371 + ... + 1053319.

It is an arithmetic number, because the mean of its divisors is an integer number (89083800).

Almost surely, 2^2051020405 is an apocalyptic number.

It is an amenable number.

2051020405 is a deficient number, since it is larger than the sum of its proper divisors (799661195).

2051020405 is a wasteful number, since it uses less digits than its factorization.

2051020405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2051020405 is about 45288.1927769259. The cubic root of 2051020405 is about 1270.5448310238.

Adding to 2051020405 its reverse (5040201502), we get a palindrome (7091221907).

The spelling of 2051020405 in words is "two billion, fifty-one million, twenty thousand, four hundred five".