20945492 has 6 divisors (see below), whose sum is σ = 36654618. Its totient is φ = 10472744.

The previous prime is 20945489. The next prime is 20945521. The reversal of 20945492 is 29454902.

It can be written as a sum of positive squares in only one way, i.e., 20757136 + 188356 = 4556^2 + 434^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2618183 + ... + 2618190.

It is an arithmetic number, because the mean of its divisors is an integer number (6109103).

Almost surely, 2^20945492 is an apocalyptic number.

It is an amenable number.

20945492 is a deficient number, since it is larger than the sum of its proper divisors (15709126).

20945492 is a wasteful number, since it uses less digits than its factorization.

20945492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236377 (or 5236375 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20945492 is about 4576.6245203206. The cubic root of 20945492 is about 275.6535069402.

The spelling of 20945492 in words is "twenty million, nine hundred forty-five thousand, four hundred ninety-two".