20692870 has 32 divisors (see below), whose sum is σ = 42405120. Its totient is φ = 7196640.

The previous prime is 20692853. The next prime is 20692871. The reversal of 20692870 is 7829602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20692871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (1325160).

Almost surely, 2^20692870 is an apocalyptic number.

20692870 is an abundant number, since it is smaller than the sum of its proper divisors (21712250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20692870 is a wasteful number, since it uses less digits than its factorization.

20692870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8220.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 20692870 is about 4548.9416351499. The cubic root of 20692870 is about 274.5408094353.

The spelling of 20692870 in words is "twenty million, six hundred ninety-two thousand, eight hundred seventy".