20906554 has 16 divisors (see below), whose sum is σ = 32438016. Its totient is φ = 10098000.

The previous prime is 20906533. The next prime is 20906569. The reversal of 20906554 is 45560902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10239 + ... + 12109.

It is an arithmetic number, because the mean of its divisors is an integer number (2027376).

Almost surely, 2^20906554 is an apocalyptic number.

20906554 is a deficient number, since it is larger than the sum of its proper divisors (11531462).

20906554 is a wasteful number, since it uses less digits than its factorization.

20906554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 20906554 is about 4572.3685328285. The cubic root of 20906554 is about 275.4825862426.

The spelling of 20906554 in words is "twenty million, nine hundred six thousand, five hundred fifty-four".