20929055 has 16 divisors (see below), whose sum is σ = 28789824. Its totient is φ = 14307840.

The previous prime is 20929049. The next prime is 20929063. The reversal of 20929055 is 55092902.

It is a de Polignac number, because none of the positive numbers 2^k-20929055 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14465 + ... + 15845.

It is an arithmetic number, because the mean of its divisors is an integer number (1799364).

Almost surely, 2^20929055 is an apocalyptic number.

20929055 is a deficient number, since it is larger than the sum of its proper divisors (7860769).

20929055 is a wasteful number, since it uses less digits than its factorization.

20929055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 20929055 is about 4574.8284120828. The cubic root of 20929055 is about 275.5813815966.

The spelling of 20929055 in words is "twenty million, nine hundred twenty-nine thousand, fifty-five".