20634430 has 16 divisors (see below), whose sum is σ = 39327120. Its totient is φ = 7768192.

The previous prime is 20634421. The next prime is 20634443. The reversal of 20634430 is 3443602.

20634430 = T₂₆₈ + T₂₆₉ + ... + T₅₂₂.

It is a super-3 number, since 3×20634430³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

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, 60520 + ... + 60859.

It is an arithmetic number, because the mean of its divisors is an integer number (2457945).

Almost surely, 2^20634430 is an apocalyptic number.

20634430 is a deficient number, since it is larger than the sum of its proper divisors (18692690).

20634430 is a wasteful number, since it uses less digits than its factorization.

20634430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121403.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20634430 is about 4542.5136213335. The cubic root of 20634430 is about 274.2821165874.

The spelling of 20634430 in words is "twenty million, six hundred thirty-four thousand, four hundred thirty".