20951902 has 8 divisors (see below), whose sum is σ = 32194512. Its totient is φ = 10220400.

The previous prime is 20951899. The next prime is 20951921. The reversal of 20951902 is 20915902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 127674 + ... + 127837.

It is an arithmetic number, because the mean of its divisors is an integer number (4024314).

Almost surely, 2^20951902 is an apocalyptic number.

20951902 is a deficient number, since it is larger than the sum of its proper divisors (11242610).

20951902 is a wasteful number, since it uses less digits than its factorization.

20951902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255554.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20951902 is about 4577.3247645322. The cubic root of 20951902 is about 275.6816237106.

The spelling of 20951902 in words is "twenty million, nine hundred fifty-one thousand, nine hundred two".