20278070 has 8 divisors (see below), whose sum is σ = 36500544. Its totient is φ = 8111224.

The previous prime is 20278057. The next prime is 20278079. The reversal of 20278070 is 7087202.

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

It is a super-2 number, since 2×20278070² = 822400245849800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20278079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013894 + ... + 1013913.

It is an arithmetic number, because the mean of its divisors is an integer number (4562568).

Almost surely, 2^20278070 is an apocalyptic number.

20278070 is a deficient number, since it is larger than the sum of its proper divisors (16222474).

20278070 is a wasteful number, since it uses less digits than its factorization.

20278070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027814.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 20278070 is about 4503.1178088076. The cubic root of 20278070 is about 272.6939729377.

The spelling of 20278070 in words is "twenty million, two hundred seventy-eight thousand, seventy".