20925542 has 8 divisors (see below), whose sum is σ = 34241832. Its totient is φ = 9511600.

The previous prime is 20925533. The next prime is 20925571. The reversal of 20925542 is 24552902.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475559 + ... + 475602.

It is an arithmetic number, because the mean of its divisors is an integer number (4280229).

Almost surely, 2^20925542 is an apocalyptic number.

20925542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20925542 is a deficient number, since it is larger than the sum of its proper divisors (13316290).

20925542 is a wasteful number, since it uses less digits than its factorization.

20925542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951174.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20925542 is about 4574.4444471433. Note that the first 5 decimals coincide. The cubic root of 20925542 is about 275.5659617004.

It can be divided in two parts, 209 and 25542, that multiplied together give a triangular number (5338278 = T₃₂₆₇).

The spelling of 20925542 in words is "twenty million, nine hundred twenty-five thousand, five hundred forty-two".