20951266075 has 12 divisors (see below), whose sum is σ = 26222373000. Its totient is φ = 16604365760.

The previous prime is 20951266057. The next prime is 20951266081. The reversal of 20951266075 is 57066215902.

It is not a de Polignac number, because 20951266075 - 2⁵ = 20951266043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3913450 + ... + 3918799.

It is an arithmetic number, because the mean of its divisors is an integer number (2185197750).

Almost surely, 2^20951266075 is an apocalyptic number.

20951266075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20951266075 is a deficient number, since it is larger than the sum of its proper divisors (5271106925).

20951266075 is a wasteful number, since it uses less digits than its factorization.

20951266075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7832366 (or 7832361 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 20951266075 in words is "twenty billion, nine hundred fifty-one million, two hundred sixty-six thousand, seventy-five".